This is something I’ve done ALOT of. Can be done with nothing more than a round-tip shovel, an axe, a bow saw, and a nice pair of loppers. A nice long pry bar - 6-8’ long - is really useful. Especially for pulling those beams.
The shovel, loppers, bow saw, and axe are all relatively inexpensive items that will last all your live and that you will use off and on as long as you own a house. So you might as well get them all now if you don’t have them already. Won’t be a wasted purchase.
The pry bar is somewhat of a luxury, but it is the kind of thing that if you have it you will find all kinds of uses for them.
I’m not a big mattock fan. Mainly just not my personal tool of choice. But would be of help on those beams. I have actually found 2 mattocks in the garbage. Those and thatch rakes seem to get tossed frequently.
I recommend a pair of loppers with thick wood handles - metal ones will bend. Also, get a set with a compound gear so that you can tighten them, then open the handles to take a further bite at it without releasing the jaws. Not sure how to describe this, but you’ll know if when you see it.
Here’s a hint re: shovels/axes. Buy Craftsman. Do they have Sears in Can? Lifetime guarantee. If you pull enough stumps, you’ll crack the handle. Nice to just walk in and get a free replacement without any questions. I’m not sure if I’m on my 3d or 4th.
Definitely get the utilities marked defore digging.
Its hard work, but not back breaking. As far as wood goes, these are all really soft. If digging a flower bed or splitting wood is within your capability, this will be too. Just consider it a good workout. If pressed, you could do all of them in one day. But it would be a tough day and I assume you would be feeling it afterwards. But you could do it a little at a time over 2-3 days no problem.
And having it done professionally would probably cost a couple hundred $.
Your shrubs are probably yews or junipers. 3 footers are teeny ones. Lop off all of the above ground branches leaving a stump maybe 6" above ground. Just start digging around the main trunk. When you hit a root, either hit it with the shovel or use your loppers. As you get about a foot down, put your shovel blade or pry bar under the main root and rock it to locate the remaining lateral roots. There will generally be only 1 or 2 going down. You will save a lot of time and effort if you take the time to locate and snip them, instead of going at it blindly with brute force. You will end up with an amazingly small stup to disbpse of. Neither yews nor junipers will sprout from the roots. But if you want to be anal, you can unnecessarily paint the cut root ends with Roundup.
For the trees, lop off the branches first. You don’t say what kind of evergreens they are, I’ll assume spruce or pine. Again, really soft wood. You can probably take every branch off a 14’ spruce with loppers alone. You’ll be left with a straight tapering trunk only a few inches in diameter. Using your bow saw, take it down to within 6-12" of the ground. You could do it in 2 pieces. The top 8 ’ will only weigh 10# or so. Heck, you might be able to take the top part off with your loppers. Then, dig the stump the same as the shrubs. Again, spruce/pine will not shoot off of roots.
Another alternative is to just dig a hole/basin around the trunk/stump, and then go at it with the axe. You can shred that stump/roots really easily, and leave the chips right in the hole. Fill up the hole with soil amendments, and just let it rot beneath the surface. This will work as long as you do not intend to plant a sizeable shrub in the identical location.
The birch will/should have a sizeable root structure. Tho 3" is pretty small/young. And if it has never been healthy, it may not have developed huge roots. Again, you do not have to remove all of the roots. Simply get them down far enough below the surface that you can landscape over them. I would cut the tree down to 6", then dig the basin around the stump, and with my axe chop out the trunk/stump to approx 12" below ground.
For disposal, you might want to rent a chipper. And then spread the mulch.
The beams are doable - probably have spikes going down 18-24". Toughest thing is getting a purchase under them to then rock/pry them out. These son-of-a-guns are gonna be heavy. Are they rotten? Just not your preference?
Oh yeah - before planting, take the opportunity to amend your soil. I’m a big mushroom compost fan.
Darn, I’m ready for this snow to melt!
Oh yeah - be careful not to muck around in your gardens too much too early. If the soil is still wet/frozen, you can compact it, screwing up the soil structure.