Now hopefully if everything is on track, the same day I close with the seller, I will approach my buyer and give them the report with all the verified holding, broker, expenses, I mentioned above.

Once he went over a certain threshold with number of properties to insure another one was a nominal expense.So not only do you have to verify sellers numbers are accurate you have to check on after that what will be you the buyers costs owning the building and factor that into the price you pay and your projections.       

I got a HML, I verified the comps, I got quotes from contractors but now my house isn't selling and I do not understand why".

Copy of documents that verify their income (letter from employer, pay check stubs for the most recent three months, benefit award letters, etc.)It is good for the prospective tenant to check their credit report in advance, so they are not surprised by things I might find when I check it.   

I use zillow amount and double check with county website to verify.

I believe he wants 2 separate receipts, $400 for his mom and $485 for him, but as I can't verify the $400 actually came from his mother - is this legal?

We did some checking and verified that he checks out.All is well.What are the questions that I should ask?

Description4 2 bed 1 bath16 3 bed 1.5 bath20 Individual tax lots - potential exit strategyNo Broker fees, FOR SALE BY OWNERMonthly Rents $16,850.00 Annual Rents $202,200.00 Annual Management Fee $20,220.00 Insurance Windstorm $4,040.00 Insurance fire and Liability $4,000.00 Taxes $15,000.00 Net Income $162,940.00 Sales Price $1,400,000.00 Havent verified the numbers, but on the surface this looks like a cash cow. 

Kristine Marie Poe It appears the current owner owns it free and clear (OP needs to verify of course) and the OP is referring to the current owner, as the previous owner (previous to him).

Check rental history, credit history, legal history and verify income.