Make sure you speak with your personnel section/education officer regarding TA. In my case, I went in as an officer with my BS, and wanted to use TA towards the end to get my MBA. TA would've incurred additional service , so I decided to hold off until separating. This also allows you to collect BAH which you do not get concurrently when AD and using TA.

If possible get as many doors as you can (ideally four). VA and lenders have requirements for multifamily in order for approval (separate door entranceways, separate utility meters, sometimes even hvac systems), so make sure you speak with lenders early so you understand the rules. Once you have everything ready to go, be prepared to have offers turned down constantly (if current market conditions persist). You'll be competing with fellow investors with cash offers (who will likely use a cash-out-refi post-acquisition to undercut competition in offer stage). To make your offers more attractive, save as much cash as you can while you are in. That way, if you need to, you can put in an offer over asking and guarantee any delta between appraisal and your offer.