Money was something to be budgeted and used to live on with occasional indulgences or escapes from the routine.

Please note that changing the AC filter and cleaning the AC air intake closet should be done once every 30 days as part of routine maintenance.The Air filter on the AC had not been changed since you first moved in (Dec 2015) and the new replacement you bought was not the right size.

Let them know you will schedule something in a few months when you are there to do xyz (some routine maintenence) basically to see if there is anything in the house that needs attention.

The MA rules for handling of the security deposit are very restrictive (read that as overly ridiculous) and mishandling of that deposit routinely results in triple damages to the landlord. 

Don't worry so much about being fancy. focus on providing something that is comfortable, clean, and with the things people would expect at home and you will be fine.

I find it hard to imagine that tenants in Puerto Rico routinely have so much cash on hand.

., it is a matter of routine inspections to discover if they are complying.

Enter the house for a routine inspection (with proper notice) and say look for ANYTHING.

You buy with a ridiculously good discount because people like you are scared away, you fix it's underlying "scary" issue, and you make a handsome profit.And what exactly do you think a professional company does if they straighten up the floors - they get underneath with a slightly more fancy car jack and do EXACTLY the same thing - but with a stinging invoice.

If you think they'd actually use the fan properly if it was quiet, I'd get a better fan.Some people do love to steam up the bathroom, and in that case a fancy switch might be more effective.