Your problem is the installation.

If an incident occurred not caused by the tenant and the property is as practical matter totally unusable for residential purposes, the tenant may terminate the lease by giving notice to the landlord before repairs are completed.Failure to install, inspect or repair smoke alarmTexas law requires the landlord to install, inspect and repair smoke alarms prior to or at the beginning of the tenant’s lease.

I had sewer backing up into a basement and sure enough the city had done work with heavy equipment and crushed the old tile line.

I’ve seen shingles installed upside down.

Interior work included refinishing hardwood floors, painting, laying new tile, and installing new light fixtures.

If you have a kitchen that has a ton of counter space I'd skip all these methods and just measure.You'll need to remember to add the price of a new sink, fixtures, and plumbing it.There are a few places in richardson off of Central Expressway that will do it installed for mid-$20s.

The last one is replacing a hot water heater that was there since 2007, which was done, $3k for an electric water heater install.

It involved installing meters inline that reported wirelessly to the internet and allowed you to bill each tenant.  

Too much trouble to reset that flange, you'd have to jackhammer up the floor and all that tile...Just get a 14" toilet.

I have an Off-Grid cabin.....we use a well and solar (that I installed myself).