Automate property management or hire a property manager.

It makes sense to hire help to shorten tenant turnover time.  

You can track income and expenses consistently using software or spreadsheets.As you scale, if bookkeeping isn't fun, consider hiring a bookkeeper for a couple hundred bucks per month.

The roofing company I hired also does restoration for homes.

If not, hire a professional architect or floor plan designer, or use tools like RoomSketcher, MagicPlan, or Matterport to create them.

The person hired a company to clean up my 3rd house and gave me a surprise of 400 USD bill for the cleaning when it should be at maximum 150/200.

Why did you hire them to begin with?

Our guests have ranged from newly hired UNR football coaches relocating their families to individuals traveling for medical care, couples on ski leases for Mt.

You couldn't pay me enough to do section 8, WAY too much work and BS with government people (who are hired idiots that have no clue).

At that point, you just need deal flow - perhaps that means its time to hire or paratner with an acquisition manager to help you find and close deals - a good realtor can step in here as well