If you plan to hover at or around 20 units, then a Yaardi, Tenant Cloud, or Cozy could get it done for you.  

I host over 30 Airbnb units here in Columbus, OH and all the studios/1bds beat the market rent!

They host multiple investor (currently zoom) meetups and have a lot of investor friendly experience in the area.

its a people business  its heavily weighted on your ability to be a host and enjoy what your doing. 

Conversely, when you’re over-excited about a deal, it can help to cloud your judgement and purchase a property that the numbers simply don’t justify.

The venue, developed by billionaire Rams owner Stan Kroenke, will also host major sporting events such as the 2022 Super Bowl, college football’s 2023 national championship game, possibly the 2026 FIFA World Cup, and half of the opening and closing ceremonies of the 2028 Summer Olympic Games.

Starting a vacation rental business by renting out other people's homes and apartments and hosting them to short-term guests has become the perfect side hustle for many.

I'll go back to my suggestion for role playing, if you ever hear Chris Voss interviewed he almost always has at least one role playing session with the host.

I am looking for an option with AMR, cloud service, no electricity requirements, and no internet requirements.

In my experience this is the lifeblood of the service and if you establish yourself as a good host, you will get increased demand and be able to raise your prices in the long term.I also tell all AirBnb folks to look into whether or not there is a large amount of traveling nurses or therapists coming through your area.