Reasobable terms are relative, but that's a pretty serious budget for a property valued at $55K.

Depreciation for what is left after bonus depreciation, the building itself, is indeed prorated, however it's a relatively minor factor compared to bonus.And read this post please, since there could be other things not mentioned by influencers: https://www.biggerpockets.com/forums/51/topics/1122635-the-s... 

Hello BP community,I am a relatively new out of state landlord and I have a rental on the market in Bluffton SC, which has been hard to get rented.

I think its also an age gap thing as when you get older you give less you know whats.

@Michelle SharkoAnswering questions in step by step fashion:- Is it a good thing to do or not is a personal finance decision and it depends on the person asking it, their risk tolerance which in part has to do with how this HELOC or line of credit works and how your personality fares relative to taking on new debt (a person more adverse to debt might have sufficient savings and temperament to pay down/back the debt versus a financially liberal person might get in over their skii's as).

Has a ten-year-old roof 3-tab, but the condition is more deteriorated compared to its relatively young age.

I had looked for the relatives of the deceased owner before with no success. 

I have two separate but related questions:  (1) What are my obligations to my tenants while the house is uninhabitable?

If you are able to make an age related withdrawal or a loan from your 401k those could be good options since the stock market is currently at all time highs. 

Hopefully with relatives that have spare room to rent affordable.