I know one of the biggest struggles from lurking on the forums here at biggerpockets is the mental and emotional struggle with the ups and downs of business.   

You have a lot on your plate... real estate could be more work or mental bandwidth than you realize/are wanting to expend.Personally, I like starting with SFH's or small multi stuff like duplexes.

The tenant is mentally unstable, didn't pay rent over a year, got evicted, forced out by the Sheriff and kept coming back to the property by breaking locks and lock picking.

Be mentally and emotionally prepared for the attitude - well, if you can afford a second (or third or fourth home) then you can afford all of this.

She is trying to mentally wear you down so you will pay her to go away.Tenants threaten to sue all the time.

It's a really good read and helps you put together a "mental business plan."

I get that there is some mental benefits to paying off your mortgage but you could be investing it and have someone else pay off your mortgage.

I know it depends on the policy, but the house is completely destroyed and cannot be sold, ive lost lots of money already and this is affecting my mental health.

There are thousands of different ways to invest that money, each will have their pros and cons, and also the time suck or mental brain damage that comes along with them.

It's a mentality of paying experts to do the work.