Most military families choose to live in the city of the base they will be working on. 

It's great that you found a seller willing to accept seller financing now just cover your bases.

Zillow gave me a rental estimate which is based on 2-beds and rentometer did not include data for 1-beds since it was searching within 1-mile radius.Is it a good thing or a bad thing if there are no 1-bed 1-bath in the vicinity?

Based on my experience, I strongly believe that investing in a Hollywood property with a pool can provide the best overall return on investment (ROI) and speculative value growth in the area.

Focusing only on traveling nurses is limiting the client base.

Based on what you have said above, I would recommend the Multifamily Bootcamp. 

But every other month we are at about $2000-3000 surplus.If we stay or buy a second home and rent 1st, the difference is about $1000 in our pockets.I don't want to make an untimely decision on buying home by missing some kind of interest rate change, based on short term financial struggles when 10's of 1000's of $$$'s could be made.

It really depends on what you prefer, some prefer crypto currency (not me), I prefer private lending / mortgage notes and structured it in a way where there is no ordinary income taxation on it, so it is treated as a qualified dividends.You can invest in anything / any type of business, it really is based on what YOU want to invest in.

I'm taking all of the expense percentages like 10% capex, 10% pm, 5% repairs and maintenance, 10% vacancy, $100 ish for home insurance based on my area, 0.7% for PMI based on my credit score, and then standard amounts for utilities, lawncare, and WiFi. 

A good realtor (which is sometimes hard to find) is a great resource to estimate current property value and ARV, however, remember that they are going to give their opinion based on what they see on the market.