@Nicholas Ladas I definitely second the suggestion to reach out to @John Warren. He is the best in these areas. He helped me with my current house hack in La Grange using my VA loan benefits. A great agent like John can help you organize your priorities to better see what you really should be looking for.
A lot depends on what your short and long term goals are with the investment property as well as your financial standing. This all can be deciphered with a good realtor and lender. Are you looking for an investment in higher rated school districts because you have kids, or plan on having kids? Or is it just because that seems to be the "safer" areas?
Do you see yourself staying at this property longer than the one year minimum requirement for VA loans? How much longer?
A lot of people here on BP might tell you that tenant stability is highly reliant on your own vetting of possible tenants. That said, I have had a great experience with my 3 bedroom units. It does seem these larger units attract families and tenants that see themselves staying there long term from the beginning. So this may be something to consider. Of course there are less 3 or 4-unit properties filled with 3 bedroom units so that would be harder to find. You may find more 2-unit properties with 3 bedroom units but that will lower the cash flow as a house hack. No matter what you choose though, when you take into consideration what you are saving in personal housing costs, house hacking is the winning ticket starting out.