What if you are the seller and the buyer goes and spooks the tenants, for example talking about increasing rent or switching utilities to the tenants.

Increasingly complex jobs will become automated.

I plan on holding on to them, however I am concerned that any downward movement in the RE market would limit people's ability to sell and thereby increasing the amount of available rental properties.

Long as I feel confident of educational content where as I may shadow it to sellers in an easy understandable format.

Yes, I understand that taking on debt may increase your Cash on Cash Return.

Obviously rates can't stay at 3% forever, so if you didn't know increases were coming then I don't know what to tell you.

A 40-50% fee increase doesn't feel right.

Are you expecting to increase the value due to fix up? 

Also, Section 8 froze any rent increases for 3 years, and now says only 3% rise and must be documented with an improvement for the tenant, not just rise in real estate tax or insurance costs, and must be approved by them in advance, and this is even though I'm already significantly below market rent.

My current property insurance provider is Nationwide and have outrageously increased the rates 2.5 times in last two years.