Conventional loans do not typically require residence.You just need to make sure there is NO pre-payment penalty for paying off the loan early.Also you will need all the repair money and carrying costs available in cash/credit. 

Hey guys I have 30 paid off single family and townhomes.

If the owner is getting rent paid by checks there are checks to trace.

Or, as Caleb mentioned, you can just pay them like a lender, so an interest rate that is accumulated and paid out at sale, or paid on a monthly basis.

It is much more advisable to pre plan your business as you expand to make sure things are done the right way while maximizing tax benefits.

You could also consider letting the boyfriend off the lease if there are no damages and rent is paid.

Property has been paid of they can't even remember when! 

I have found out from court records that the mortgage company has been paid his debts back In August so I am thinking that it is too late to contact the heir and now it’s considered bank owned (Or is It?)

What would it be like if you paid $40k for a home (even if you had a loan for 100% of the price) and it rented for $750/month.   

The service will probably be the only one actually see the change, and they typically have bigger things to worry about then a mortgage that is being paid on time.