Now we're thinking about our next investment, basically looking for opportunities, either for AirBnb or regular rentals (considering condos / duplexes right now)

Some of the areas where that will cause investors to become frustrated are regular reporting, timely delivery of payments, accurate and transparent financials, timely delivery of tax documents, and the ability to meet target projections related to timing and returns. 

Also, when do the home inspector's hired by the bank typically stop their regular check-ins after the property is sold?

Require adequate notice, advertise before the vacancy, preferably 2 months ahead, and ramp up your advertising.Assuming you do regular inspections to insure your units are maintained in good condition and allow tenants a smooth move out you implement a plan where by they assist you with showings while they are still in the unit.

I know there are people who have the money but don't want to really put in the time and effort to go to the property regularly, oversee the work, etc.

Did you start a separate entity for the REIA or is it run out of your regular LLC?

Our LLC is on the deed and they sell like regular real estate.Cheers

As long as you are doing regular inspections (quarterly) and doing repairs immediately billed to the tenants turn over costs should usually not amount to any more than paint and minor repairs.The key is never leave repairs till they move out, that is way too late. 

As far maintenance, I think it may be best to get a handyman on board which can do various things on the property on regular basis.

Set up your voicemail like a regular person and respond to it.