The calcium buildup will prematurely wear out the heater(not in your case, ancient heater that runs forever) and allows bacteria growth as well as decreased thermal capacity.

Your lease and your actions must be as if the lease went full term and the move-out is per the move-out inspection and no punitive action for premature termination - - aka, they are due FULL REFUND.

I have no expectation of getting a dime out of someone who moves out prematurely, but I also don't want to give them a penny of their deposit if they bug out and leave me with an unexpected vacancy.

Using this approach, you could end up owing his estate upon his premature death.

Debris should be removed from the roof surface to prevent premature wear and proper drainage.- Repair: Pointing of deteriorated mortar between the bricks of the exterior walls is advisable throughout to prevent further deterioration (front and rear).- Repair: Damaged brickwork at the rear wall should be repaired to preserve the wall.- Repair: The loose siding at the front porch roof line should be re-secured to avoid wind-damage and varmint/pest entry and moisture intrusion...

@Colin MurphyWelcome to BP.While it is probably premature to create a holding company for your future properties at this point, it is good you are thinking about it now.A Limited Liability Corporation (LLC) is an entity which straddles the worlds of sole proprietorship and the corporation.  

My painter prematurely repaired and painted over the ceilings, which allowed one rainfall to taint a brown fringe around where the old hole in the bedroom ceiling was before we finished the roof.Throughout, they never answered their phone or texts, forcing me to come up to Baltimore and bang on the door several times per week just to communicate anything to them.

Daniel, if you are asking these questions, bidding at auction may be a bit premature for you at this time.

Once you decide on a house I have a lot more advice, but it is premature until you have the house picked out. 

A normal equity investment account will likely induce the same amount of taxes on long-term investments as would an IRA or 401k, but it doesn't offer tax-deferred benefits with that compounding growth nor are there fines for accessing that tax-deferred account prematurely.