It will depend on the quality you're looking for..

I spend 1 hr (on the high side) per month managing. 

That's why, its best to shop for quality lenders. 

Stop with the guru sites, the videos, all that nonsense is pure crap designed to drive the lazy into highly risky investments or investment schemes that will surely see you make a little or lose a lot. 

You may feel like a 6-7% rate is "high" but it is historically a pretty average rate.

You can also sell them on sites like paperstac, debexpert or others as well as brokers like Mission Capital, Rams or Phoenix.Depending on quality of paper and interest rate will determine sales price - also I would say self servicing can have a negative impact on the sales price as the major players in the space are not fond of self servicing. 

This is assuming that you can prove that the issue was their fault, and not yours.The problem is that the cost of litigation is very high, likely not worth it.

If you can house hack a duplex / triplex / quad locally, I highly suggest it.

I am just worried this might be a mistake as it as a high cash flowing property and my mortgage rate is a low 3.125%.

The no-show rate for prospective tenants in this area tends to be quite high.