This way, seller would prepaid all the rents for April, and it gives me time to settle and get everything setup with the tenant. 

The downside -it can be extremely difficult to get rid of someone who has pre-paid.  

Hopefully that is not the part you are saying should be 4-5k. yes origination points your 1.5 % is just a part of it.. you have pre paid and 3rd party charges you can see on the HUD but then you will see JUNK fee's to the lender.. these may include.1. underwriting fee2. appraisal review fee3. doc prep fee on top of what the title company chargesand just about anything else U can think of  that's why they are junk feesyou simply cannot be in the mortgage business and not bring in 4 to 5K per file unless your getting service release premiums.. your over head will eat you up and you would be out of business.  

PS of A charges an entire months rent, this was in their email-"OPTION A for a vacant or occupied property:For a vacant property coming on board for the very first time we are offering a special promotion where for the first 60-days we will not require any prepaid funds from you for advertising or minimum management fee.

I did month to month agreements, so it wasn't as scary to take a chance on people, but mine had verifiable school records or employment offers.What you could do, is take the money but write up a month to month agreement, and you still reserve the right to kick them out with 30 days notice and refund any unused pre-paid rent.If he has come to work, he will get a social security number, so you can ask for it.  

Also we met with the park owner when we purchased and negotiated a lower HOA fee if we prepaid a full year.

I deny evictions unless they provide 6-12 months of prepaid rent...

We had one tenant who was supposed to be paying $500/ month buy had prepaid his rent at the rate of $430/month, which we did not discover until we got the leases.  

You then look for another new tenant, and you have to reimburse the leaving tenant all of that money they pre-paid, less rent and advertising fees to find the replacement.  

When you purchase the property, lease agreements, deposits, and prepaid rents all get transferred to you as the new owner.