Unless there is a history of STRs in the property already and you have experience with STR, you really wouldn't be able to supplement your income with that. 

Children won't have a credit/criminal history, rent records, etc.My application fee is non-refundable.

The document that records the sale is called a "Tohon" and does not list a sale price. 

Sometimes it's nice to get a new lease so that you can increase the rent right off the bat, but having tenants with a solid payment history is worth so much more to me.

The others are just pre-screened, not a full application so it's a bit harder to say "you don't meet criteria" because I don't actually have a verified income, credit history or background check - just what they've said in the prescreening questionnaire. 

All you can do now is take pics and document what she is doing.

Verifying last 2 years of rental history very important!

For Conventional, you can only use 75% of the gross rent until you have Sched E history for the rental for a net rental income analysis. 

Mortgage notes require due diligence on borrower history and property value.

In order to do this you need to have deal flow and you need to know 1) How to recognize a good, profitable deal, 2) How to put together funds quickly to buy the deal before someone else does and in such a way where you are protected and the deal is protected, 3) How to run the project so that you follow the budget and don't overspend or overbuild, 4) How to attract an end buyer or a renter and which documents to use to protect yourself and the buyer, 5) If you are going to keep the property then you need to know how to set up the property from the start to best help you in the refinance later, and 6) You need to know how you are planning on managing the property from the beginning in order to make sure it will be profitable at the end.