It depends on where you want to live, income, personality, and other factors.You could buy a large home and rent out the individual rooms to cover expenses, but this comes with problems.

Typically, if you have a mortgage, the mortgage company will collect taxes and insurance when you pay,  so there is not really any budgeting required for this.

We typically pay somewhere in the range of $3500 for a new, basic furnance, including install, if there are no other modifications to the system required.  

There are a lot of websites that offer the course online, or if you have a college near you, they also typically offer a class that satisfies the pre-licensing requirement.

I know lots of installers don't do it, and I personally prefer the unimpeded look, but anything installed outside of the requirements of the material is probably going to be limited, i.e. the insurance company is not going to pay you because the material was not installed according to flooring requirements. 

The sellers had put so much pots, plants, planters and shrubs out that I thought there were too many plants/planters that would require a new owner to upkeep.After a few potential buyer tours/showings, the owner heard all the comments (via the security cameras) about how there was a "lot going on with the plants and stuff out front".

Finding these guys will require someone local or a lot of luck.

Maybe I’m wrong but I had to do that on our STR (Ring) and Wyze also requires close proximity on initial setup.

Most building codes and HUD standards require bedrooms to have windows for egress and ventilation.

They require the same amount of attention as everyone else and we are one entity....Not everybody dances to the beat of your drum.