I am a full time firefighter that works 82 hours on with 96 hours off but my schedule changes daily I may be forced to stay at work on my regular days off and I’m worried that I will not be able to find a brokerage that will allow me to work part time.

If you're looking to treat this as a regular rental, then charging undermarket rent throws a monkey wrench in that. 

@Holly Thorsen see above for potential challenges tapping your equity in the rental.You only need 5% down for a regular mortgage, 3% down for an FHA mortgage - so why don't you have the funds?

In this situation the tenants attended gatherings late into the night and would regularly return to their room extremely noisily at 4am.

I can finance regularly with non recourse and have a note of about 75k less the down but plenty of funds just sitting there in the solo doing nothing.

Regular LTR's in DET would be fully managed.

I guarantee you don't have the right to "sell" that property as you've done because the bank has a lien against that deed which must be paid if/when you sell, and you almost guaranteed to have language that you are supposed to notify the mortgagor if/when you sell the property so that they can exercise their due on sale clause. 

As I stated above, please exercise caution and make sure fully executed documents are received prior to wiring funds.

I realize this may be a fantastical scenario with no feasible solution but I thought it would be an interesting exercise.

When you sell your old property you exercise your option and purchase the new property.4.