Dustin, glad to hear your investing your military pay wisely. I'm a Vet also and have been also buying new construction as rentals. This type of investing does not pass the 3% formula you see mentioned here, but I'm a buy and hold investor and as long as I have good cashflow from day one after PITI, HOA and vacancies I'm happy. This usually means a hefty down payment. This strategy is long term and quite boring. If your looking for a career move after you retire from the military you may look more into the fix and flip. This will keep you busy and has the potential for much greater short term gains.
I'm not sure why your mortgage broker told you to wait 6 months. Your credit will take a slight hit for a few months after obtaining a mortgage and the bank your dealing with may have a restriction or grace period on purchasing investment property, especially if you are a green investor it may be a requirement to wait for some lenders. But you can always shop around and find out yourself.
You mentioned about tax advantages while deployed. Your pay may be income tax free, but I can't think of any other advantage this will give you for purchasing RE. BTW, how will you be able to purchase if you are deployed?
Good luck and welcome to BP.