If people took the five minutes to complete it they would not need to be asking and searching the internet for their answers. 

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

;however, my issue is that I dont have good credit and since im self employed I make.very little income. 

Thats your bonafides to being able to do future deals.As mentioned above, keep your credit perfect.

For me as well as the seller.First, you have to define Sub to financing.Do you mean the reckless kind where you overpay for a property, take over the financing and borrow from others to cover closing costs and holding costs when you have no money, no credit, no income, no reserves and can't tell a warranty deed from a deed of trust and you close on the kitchen counteror do you meanbuying below market value, already having a nice income, having reserves, using escrow and title, already understanding the due on sale clause, have done a lot of creative purchases and know when to use and when not to use creative finance and how to recover if something goes amiss?

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

The mortgage will also stay on the seller's credit which might create an issue when/if they try to purchase another property.

I would try deleting my temporary internet files in your browser.

depends on your credit if you can get a mortgage or your ability to find good deals that you use hard money for and then refinance into DSRC.  

I wasn’t late on one credit card payment.