My name is Jed Butikofer and I am currently located just outside Bakersfield, CA, but move frequently for work. 

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 run into this issue frequently where NJ investors are looking into out of state thinking it is cheaper, that's not always the case. 

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?

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

Scenario 3), the you could come out marginally ahead of making monthly extra principal payments of $300.00, provided you were not pulling the lump-sum from a LoC and then repaying the LoC over the ensuing 10-months ... as the additional interest would negate the marginal advantage.Scenario 4 and {my favourite} Scenario 5 were included to illustrate the benefit of more frequent principal payments.

We deal with the issue frequently.

Much less frequent, but we also weren't allowed to participate while my husband was a housing commissioner, as it would have been a conflict of interest.