Generally, it has fixtures toilets vanities etc .

It's probably a toilet that is constantly flushing and/or running.

Plumber came out and said that the toilet mechanics needed to be replaced to stop the toilet from running when flushed. 

I let contractors have keys to these, then when I'm done having strangers in the house I put the finished locks on so I don't have to change locks again.I try to keep one working toilet available in a rehab house at all times.

(Moving a toilet, installing a double-sink vanity, etc...)Do I have to tear it all out of can I use any of the existing fixtures?

If you pay the utilities, there is very little concern for conservation  on the tenants part.. they are less likely to report leaks/running toilets.  

Get them fired & have the satification of two-fold revenge: evicted & fired lol*Im not an attorney and this not legal advice* That is a great way to finally get possession and find cement in your toilets and drains as well !

I have joe and Mary here who are qualified and looking for a nice home just like yours to own.so here is what I offer, I’ll take care of the tenants and toilets, I just need to come to an agreement about the lease terms , and if you say no to me we can still be friends are you ok with that mr or mrs seller?

I shudder to think if I were asleep and suddenly woke up with the need to use the bathroom toilet how I could negotiate two flights of stairs without leaving a trail! 

I get depreciation, principal pay down, positive cash flow of usually about $500 or more per month per property, and the Tenant Buyer maintains the property (so, no toilets to worry about ;-).