And at exact same time forced the use of an alternative one, remote working.

Sounds great but no pathway to an alternative.  

An insurance policy is a possible alternative if you or the prospects can find one.

Yes, contract for deed is a good alternative -- but not in Texas. 

If you have an issue with the way the landlord (you) has handled things your options are therapy or GET DOWN ON YOUR KNEES and pray.Your recitation of events reflect the owner acted in a timely manner and you failed to report the leak.

Alternatively, you can check that one, it's also free to use:https://www.realestatespreadsheets.com/online-airbnb-estimat... 

I think the best alternative out there is Hostaway but will need inputs from other members in this forum and see how is Hostaway working out. 

Any advice or alternative recommendations would be greatly appreciated.

If this is a qualified retirement account (tsp’s are) then you can transfer/roll this into an SDIRA or solo 401k and as long as the custodian allows for alternative asset investing you can invest in real estate or just about whatever you want.  

I'm looking for alternatives as they've been increasing the price and I'm paying close to 70 bucks a month on the software.