Grad students do it all the time. I’m in the lab 70hours/week and I still have time to eat (food breaks don’t count as working!), do laundry, and even go out every now and then. It can be done! It’s not all that bad. I’m less stressed than I was in my undergrad years. Some people spend more time in lab than I do, and they’re not gibbering madmen (yet).
**I am going to work 7 days a week. Am I insane? **
The question is really: Do you enjoy what you’re doing? Do you feel fulfilled by your work? If yes to either or both questions, I’d say keep on doing it! What works for one person may not work for someone else. But if this works for you and you don’t resent putting all this time into your work, keep it up until you want to do something else with your time.
You’re young. Now’s a good time as any to do it. Do you still live at home? If so - bonus points for being able to save mad money, have food readily available and a sympathetic parent that might be willing to get your laundry done.
Plus, since you play piano, the weekend jobs you’ve chosen will give you ample opportunity to get your “practice time” in WHILE working.
I didn’t work 7 days a week on a regular schedule when I was your age, but at one point I had 3 jobs. I made a boatload of cash which eventually gave me the opportunity to be lazy and work only 7 hours a day 
I am trying to save up as much money as I can because in December my girlfriend and I are moving in together, so I am building up a nest egg right now. More hours worked=more money=more savings. The longer I am out of the house, the less I am tempted to spend money.
After I move I will probably scale it back to 6 days a week (Honestly I’d prefer to have a weekday off if I could choose- that way if I had to go to the dentist/dmv/bank/whatever they are more likely to be open).
Working 7 days a week is extremely tempting because I don’t start earlier than 10/11 AM, and never finish later than 8/9 PM (depending on the day). This means I always have enough time to get ready in the morning. Then again, just my luck my sleep cycle will adjust accordingly making things no different than when I had to start work at 7 
Ack, I’m about to do that too.
5 or more days a week testing videogames, and the other two in a chocolate store. Until the end of October at least. It’s necessary, but it ain’t gonna be fun!
Good luck to you. Here’s hoping for both of us that it doesn’t suck too much!
No offense, but from the sounds of that, your life will be every young child’s dream. Of course, reality doesn’t quite fit the description, but damn if that doesn’t sound fun.
If someone was going to be working 7 days a week, I’d say these are possibly the best jobs to be “stuck” at 
Like telling a kid he’ll have school 7 days a week, but the only classes he’ll have are Lunch and Recess.
IME working 7 days a week is ok if you’ve got someone to take care of the house, kids, bills, administravia, etc, or if you’re doing it for a very short period - a month or two max.
It’s also a lot easier if you have flexible times.
Like grad students, who are working/studying many, many, hours each week, but can take off almost any given afternoon if they’re feeling burnt/it’s a beautiful day/have a doctor’s appt/etc. They also usually live fairly close to lab, so they can pop in for a couple hours after dinner or pop home at lunch to finish laundry or something. I’m sure there are other professions that have this kind of flexibility.
60 hours of that is only as tiring as a 5 x 9-5 week, IMO.
My parents work from 6 am to 9 pm on weekdays, 9 am to 8 pm on Saturdays and 9 am to 5 pm on Sundays. Yes, it can be done; I’m just not entirely sure how. I don’t think you’re insane for working 7 days a week, but only if you can handle it.
Testing videogames actually can kind of blow. Think of a 70% rating video game. now imagine it is only half-developed, with all kinds of bugs and problems. The really cool graphics aren’t in yet, nor is the entire plot.
Now think of playing the same level over and over, for 8 hours, not to pass the level, but to try to figure out why in certain circumstances the wrong sound bite is triggered, or why the sky is flashing the wrong color.
Good times.
We have a discussion about this all the time. There are people who would go nuts at your “grad student” role, because they would never really feel like they are truly off from or away from work. They want the scheduled times, so they do not feel pressure to get “back to the job” after they go home.
Agh! Yes! Crazy, crazy man!!
It sucks to not be able to take your car to the shop, or go to the bank, or go to the DMV because you’re always at work when they’re open. But it’s doable, especially if it’s 6-8 hour days. It got a /lot/ easier for me when I learned that (1) work doesn’t have to come home with me, and (2) when working long hours, one should always carry protein bars. And money is so nice to have.
This seems completely doable for a motivated person. Because your weekday job is not standard business hours, you should be able to get appointments out of the way in the morning (DMV, dentist, etc.).
Since you never have a full day off, be very clear about building in some fun and rest time for yourself on your shorter workdays. Maybe meet a friend for coffee and breakfast rather than just sleeping in, or go to the park or the library.
Also, maybe plan ahead to take a few days off, a long Labor Day weekend or something, so you know there will be a break.
Good luck!