I later went into doing concrete before pursuing Welding and Fabrication where I did stainless installs and custom equipment, before finally settling in on Machining, as to further pursue my life's passion of designing and gunsmithing.My wife and I bought a house a few years ago and are looking to do a refinance soon, drop the PMI, and use some of the money to do some repairs and possibly finish an apartment on to our detached garage. 

When the temperature came down, the fan turned off!

Something about oil that deteriorates with time, sun, rain, temperature changes, etc... 

Tile is very inflexible and wood houses move with temperature and other weather changes.

My other suggestion would be going to trade school for welding, plumbing, electrician, etc and learning something that can help you add more value to your real estate portfolio.

Nobody else can say what your mortgage is going to be, what cable package you're going to pay for, what extras (or not) you intend to provide, or if you go with the cheap thermostat so guests can abuse your HVAC or pay $200 for a smart one where you can set temperature limits.  

The liner for a pool has to be set when the temperature is above 60 degrees on average for the warranty.

The local PHA will determine what temperature is considered adequate during each month of the year.The cooling system must safely cool each room.5.

(somebody broke into the house....) and I can't find this type of latch because is welded to the frame... what could be a good solution?

It monitors anomalies in water usage, pressure, flow rate, and temperature.