Tenant occupied properties can be attractive to investors if cash flowing...no one wants to buy someone else's problem. 

To qualify for installment sale you must selling an investment property, it was a rental for at least a short period. 

Short answer: No, definitely not. 

The owners of 100+ unit complexes are not individuals who will be swayed to sell by a good offer or the need to cut short term losses.

@Desiree Board For your mix of long-term rentals (LTRs), short-term rentals (STRs), and house flipping, an LLC is ideal for liability protection and pass-through taxation.

That is tight leverage for an investment 2nd position loan.A private investor might be willing to do it, it's not going to be cheap at all & will be short-term money & will not be a line of credit to take out at your liking.What is your rate on the 1st?

Needless to say we were pretty disappointed, so shortly after that another student reached out to us and told us that Ryan and Tyler had agreed to sponsor them 4 different times and backed out of each one causing the students to lose earnest money.

If the house is under water with the OCWEN mortgage, then approach the mortgage holder about a short sale. 

@Marc Shin, Soundproofing is definitely something worth tackling for a short-term rental—it’ll keep your guests happy and help you avoid complaints.

Q2 is most important: If the mortgaage is upside down, it would have to be an approved short sale and that could take a very long time to rectify.