Katrina -- as with all of the rest of life, it depends...
$70k is a lot of money. Geez -- where to start.
Do you have debt beyond the condo/rentals mortgages, what some of us might refer to as 'evil debt'? If so, what are your interest rates on those evil debts? If evil debt interest pain exceeds 3%, pay them off. Car loans are usually evil debt, but depends on your financing.
Do you have an emergency fund to cover 6-12 months' of expenses set up (can be a CD ladder, I-bonds, etc.) A CD at Ally.com currently pays 3%. An I-bond pays >9%. These numbers are useful to compare against debt obligation math.
Are you and spousy contributing to a TSP? If not, why the heck not -- doesn't the mil still match your first 5%. Redirection of that immediate income into a TSP might require using some of the $70k for meeting monthly bills.
Back to not-as-evil debt: Will paying off your condo save you a lot of interest in the future? If your mortage interest is greater than inflation or significantly above what you can make investing in an index fund such as VTI, then paying down that mortgage could make economic sense. Or, if mort interest on principle home or investments results in a personal or business writeoff that compensates for the not-as-evil debt, maybe leave it alone. But if you have a loan at 25% for some reason, that $70k could be useful to staunch the bleeding there. Otherwise -- if your $70k can net you better % gains after taxes/costs than your mortgage int -- let that interest ride and deploy the capital elsewhere. I have a few ideas below.
I personally believe most folks should diversify investments widely -- so yes, the stock market isn't scary. Want to get into it and hit two birds/one 50cal round? Do you and spousy have Roths? If not, do you qualify (based on income)? If so, each of you young folk can toss up to $6k into a Roth each year if you have qualified income (active mil does count :) ). Become an old geezer like me with active income and ya get to toss another generous $1k in. I'm lazy -- I don't try to beat the market or time the market or even whisper sweet nothings to the market. I simply AM the market. It'll go up, it'll go down, and it might dang well flatline for the next five years. But overall, a passive index fund like VTI held in a simple account at Ally.com or eTrade or a thousand other options will track pretty well over time. I think most analyses show after subtracting inflation, the market does ~7%/yr in gains. That's over the past 100 years or so (include all the scary wars, depressions, recessions, obsessions, regressions and so forth). Rule of 72 suggests you'll double your money every decade or so. Some thickheaded people like me aren't fond of individual stocks - but play a little and find your comfort zone. Folks who say 'stay out of the market' may need to get out more. Unlike what Kiyosaki thinks, there is a much bigger colorful world available to investors -- we're not all one stripe.
As you are likely covered under the mil VA plans, I don't think you have an option to get a HDHP that permits opening/funding an HSA account. If I'm wrong, look into that -- even better equity investment tool than Roths. And if/when you get your DD214s, you may need to explore healthcare plans -- who knows that vets will have to put up with in the future. HSAs rock in the private sector.
Now that I've spent a little of your cash, I'm going to gang on to the others and suggest y'all keep rolling with more properties. You'll find your balance between real estate, paper investing, running your own businesses and living a large life. No one of the rest of us can work out that formula for you. Have fun doing it!