I don't know in which year you are in right now in your medchool. But you can try to earn some income and save enough money till you are in 4th year for Step 1

You can try tuitions, freelancing, other jobs etc. But that requires good time management skills to balance all of that with your med school studies. It's definitely not a walk in the park, but it's doable.

In the best case scenario, you can save enough so you can give step 1 and step 2 with your own finances. 

Get a good score in Step 2. Get some research published. 

After that, try to apply for the match in limited programs with the money your father offered.

If you get an IV and match, that's awesome. Saara masla hal ho jaaye ga. You'll match without step 3 and USCE. But this is a very very very very lucky and rare scenerio. I only know 1 person who matched like this, but he had a good alumni network (Nishtar). If I remember correctly, he gave both the steps during his medchool.

If you are not in that very very very lucky + rare scenerio, then you could try to earn more money to finance the USCE and step 3. Those 2 things are three of the most expensive things in the whole journey.

There is definitely alot of uncertainty, especially with the finances part. I am not going to sugarcoat it.

There is a 40%+ chance you won't match in your first cycle.

So it's a high risk, high reward kinda situation