Keep in mind SFHs usually make for poor cash flow properties and home owners do not have a clue about rental properties.Many foolishly believe if the rent covers the mortgage plus a little they are golden.

@George Firn,If the owner owes "several thousand in back taxes", seller carry-back isn't going to solve his(your) problem without enough money down to pay the back taxes.

You would be amazed at what some quality GC's can come up with to solve the problem as oppose to starting over.

Most people learn to walk before they run.If you knew how to solve these potential title problems you might be able to assign time and expense values to their resolution. 

Michael Dunn Figure out their problem to sell and solve their problem.

As they tell you about the house, listen for hints and clues about why they're selling (needs repairs, short on cash, mortgage payment high, need more space, etc.).

Hello im guessing this problem has been solved but i do know someone who is pretty good in this area. 

I didn't have a clue on the comps it was a duplex but I did have info on what each unit rented for.

The service that an effective wholesaler provides is the ability to solve a problem or multiple problems that may not be able to be resolved by agents or others.Some Sellers don't trust agents.

Provide all these documents to help quell any jitters the buyer might have:- copies of rental agreements - current tenant contact information- payment history of each tenant and any 3 day notices you issued- copies of six months of utility bills you were responsible for- CLUE report showing no insurance claims were placed against the property in last seven years- Estoppel certificates if your state uses these (tenant's signed consent of financial terms of rental agreement (SD, LMR amounts, current rent amount, utilities they are responsible for)- Any capital improvements with receipts made on any of the units.