There is so much free content out there that can teach you about guest services, software, vendor management, and so on. 

Not every STR has to be a 4 Seasons and even those I've waited on service before and it's not like someone was breathing down their neck waiting to revoke their hotel license when it happened. 

I would say to expect a floor rate of 6-6.50%

The limit on scaling is your deal flow (mine never was that good) and time it takes to perform the value add (I got fairly quick for example, my last rehab did all new plumbing, electrical, and flooring.  

@Alecia Loveless is correct--tenants need access 24/7 to their electric service panel, water and heat, assuming those are individual utilities for each unit. 

They are either a combination of a Maintenance/Tenant Management business or Accounting/Real Estate sales/Tenant management service. 

Quote from @Nadine Wallace: You can do simplisafe with/without Wi-Fi, but you will need cellular service.

The height from the floor is 68".

The first house that I bought was 17 years old, 3 br, 1.5 bath, brick ranch house with hardwood floors, Andersen windows, ceramic tile baths, gas heat and a brand new roof. 

Some operators really need better training and education and drag down the great operators who are doing it right and offer a great service and product.