Ask for a "zoning verification" and confer with them on your potential plans.   

This is my first deal without agent. what should I pay attention to to have the house closed on time.

.- same with buying subject to (to the existing financing) then sell on a lease and option (using time to create equity and your profit).It only seems like the knowledge needed to be a wholesaler is easy, and cash needed is low.  

Did a rental verification and the landlord says they owe back rent.

In my mind it comes down to trust and then verification. 

I think that in addition to "to each his own", a person's personality is a big factor in making these decisions for themselves.

I am using the next few months to to judge the situation. 

@Charles CampbellNo income verification, 30 year fixed loans in the 6's for 1-4's are not unicorns; granted the rate is a little higher than Fannie/Freddie money and there are fees, but those loans close every day.Stephanie

But we are realizing how much time and money it is to to keep it going so it's helping us detach from it. 

They will sniff all this out and will want verification of the source of funds for the down payment (bank statements, cancelled checks, wire deposit receipts, etc).