What’s the water pressure?  

Problem here the tenant didn’t declare cats as pets.She ruined the unit in one full year and it took more than $11,000 to replace full floors in two level townhouse plus other water leaks damage.tenant left without telling.Now I am asking property management must visit quarterly to catch damages early on.Ozone machines did not help much.thanks

Stop hanging out with your deadbeat buddies who spend all day drinking, talking sports, and otherwise wasting away.

But there is nothing like the eyes of someone that has installed a water heater, replaced a breaker box or laid a floor to really get to the bottom of the true issue on a home fast. 

Here in TX the soil is mostly clay, and it shrinks and expands with humidity level (thus the need to "water the foundations" as a measure to avoid foundation cracking), so foundation problems are a common occurrence.

and two of others (furnaces, water heaters, appliances, etc.?) 

Electric stove, dryers, water heaters, and high-efficiency Mitsubishi heat pumps.

Curious if anyone has tried the smaller 20 gallon water heaters? 

Yes, as an accountant, I do know that 50 minutes is less than an hour, thank you. 10 minutes for a stiff drink in between.10.

It has separate gas, electric, two hot water heaters, etc.