Some owners are pricing their homes to actually sell and there are some who are listing them at excessive pricing hoping someone will want their homes without the wait and pay a premium.  

Benchmark is a tad more expensive, but not excessively: $439/transaction and $75/mo.

Another issue, is that some of these repairs were in excess of $500 and I was never made aware of those repairs. 

We need more info to know how much of that 7% is truly excess return, but I know it isn't all 7%. 

What is the best landlord insurance to prevent the damages from being excessive?

Which in a sense would pay off the 1st lien and excess would be profit?

Usually a notice to quit will be for a lease violation, such as excessive noise. 

Some caused by excessive wear and tear by guests and some by poor quality parts.

That being said, I've been hearing of people who use Tesla solar/power walls to generate electricity and sell excess electricity back to the grid, thereby generating a sort of passive side income.

Read some post or book or whatever somewhere and wanted to press to expand his net $4k monthly too $5k+, which no, pigs get fat and hog's get slaughtered.