Anyway, as you can tell, OP, to keep it under 1500 is going to be a stretch. So get a job or a credit card or something.
If you live in a state where in-staters have a good chance and you want to stay in state, then you can probably keep the costs down. But if you're planning to apply to more than, like 7 schools, you're going to need a lot more than $1500.
7 schools:
Primary: $250 (130+4x30)
Secondaries: ~$500 (7x~75 each)
Suit: $100 (if you do thrift store/super cheap stuff)
Already at $800 and you haven't done any interviews etc.
Interviews are the most variant, but for arguments sake lets say you get like 3/7 interviews. And you can drive to 1/3 and can stay with a student host at 1/3 (these are random numbers but seem pretty respresentative for how many schools offer hosts and how many applicants can drive to interviews).
Now you've got like $100 gas, $400 flights, $200 hotels, $50 for taxis/subways/buses. And interviews are going to run you about $750 more and thats a pretty conservative estimate.
So IF you only applied to a few schools and only went on a few interviews, yes it would be doable. But since most people don't have a 4.0 GPA, 40 MCAT and sparkling personality most people have to apply more broadly. Decide how confident you are in your application and decide how many schools you want to apply to. Then find a way to get enough money.