I bet you one of them has a few houses that they've purchased at previous duty stations and are currently renting. 

A realtor would be your best bet.  

A local real estate attorney is probably your best bet, as there might be local items that need addressed.Additionally, when I bought my first rental, I took a couple of the prior leases I had from when I rented and input pieces I liked from those as well.

The best bet is to have your numbers together, know how high you can go, and stick to that. 

I mean there wasn't any time  when there was a waiting period for a Rehah to take place.

I'd say your best bet would be to get on a phone with a lender and talk through the proposed situation so they can give you an idea of what you are looking at and how much it's going to cost.

Best bet is to call a hvac guy if you want correct numbers  

From what I've heard on podcasts, if you are looking to go the refinance route your best bet is going to be a local portfolio lender. 

@Tomasz KaminskiNot what you want to hear, but you're planning your trip without determining your destination.A house-hacking duplex and a 401k will not let you retire anytime soon.

Feel free to give a call or shoot a text anytime.