I would do this every 12-15 months if my spouse wasn’t totally opposed to moving frequently.

Also, I'd lease out the other bedrooms for additional income as well as practice screening, leasing, and interpersonal comms.  

If my partner wasn’t risk adverse and unwilling to move frequently I would buy a new property every 1-1&1/2 years using this method.

Frequent turnovers can quickly eat into your profits.Instead, I’d recommend building up a solid reserve fund and addressing work orders promptly.

If so, how frequently?

It can be usable for both if you were vacating the units and there was a 12 month lease agreement.

We also follow-up with the recruiter or HR lead after each stay to tell them what a great experience we had with their employee and to ask them to think of us in the future when they need to place someone in a midterm/corporate lease.

I find little reason to pay for a service when it takes so little time for us to simply split the water bill as agreed when the tenant signed the lease.  

Every system you try will have flaws, or you may salivate over a feature that appears in other software.Some familiar names are mentioned frequently: Stessa, Apartments.com, RentRedi, TenantCloud, Innago, RentManager, Avail, Rentec Direct, Doorloop, etc.I recommend conducting thorough research on each app online to understand their offerings, pricing, etc.

I'm looking to sell one of them - a 2 bedroom 1 bath thats rented for $850 with a lease in place until next July.