You could look into getting an adjustable rate mortgage with an interest only payment.
For the first several (usually 5) years, the interest rate would fluctuate with prime and the payment is much lower then a normal payment because there’s no principle included in the payment (though you can pay extra if you want).
This is, if my understanding is correct, the type of loan that got so many people in trouble a few years ago. They used this type of loan to buy more house then they could afford and didn’t realize that had to (pay attention: HAD TO) refi in a certain amount of time. Not only that, they didn’t realize that they would have no money put towards the house. Also, since at that point (and this would likely happen for you as well) the prime rate had gone up so the had to refi at a higher rate. Of course, bankers were also offering them to people who couldn’t afford them, so there was that also.
These types of loans are still available, so something like that might be just what you’re looking for. Just be careful, and if you get one that will force you to refi in 5 years make sure you’ll be able to refi at a higher rate and still be able to afford it.