I have a fully executed version of the lease with both of our signatures, so the basement language is enforceable in my opinion. 

Be sure that the plumbing and electrical are all good before replacing walls or ceilings or you could have serious trouble and expenses down the line.Regarding finances: I have used QuickBooks Desktop version (saves a lot of money but does not get the constant updates) for five years.

Quickbooks desktop is a way better version of the software than quickbooks online.

I will list a few options below, but the TLDR version is I may be able to help you with the Dispo side depending on the deal structure and comps.

This is just another version of the scammers that call you and say the IRS is after you, or your about to be arrested or any other number of scams.

Simply the time to do the STR business well would have been challenging if we were deployed (your version of out to sea).  

I think it should be based on the commercial version with the NOI and the Cap Rate since it’s a 12 unit.

It has to be the premium version as the free version is pretty useless IMO. 

I just bought the Kindle version of a book entitled "Investing in Real Estate with Lease Options and 'Subject-To' deals by Wendy Patton.

Happy to assist and walk you through the process, but the boiled down version is refinancing at the purchase price at a certain LTV.