The sky is literally the limit, and we have SO many benefits as military members.

He pays ordinary income on the note interest and CaP gains on the principal he receives each year. 

Awesome story with some awesome gains!

Definitely utilize this benefit while you can.

All mine are currently on 15 year notes, and while I understand the fiscal benefits of paying off loans more quickly via a ten or fifteen year mortgage, I struggle with my desire for monthly cash flow. 

This was when I began gaining interest in the subject.

Hope you'll find the real benefit of it. 

If you have sold few houses in the past and your initial intention with this house was to flip, you gain is ordinary gain, not capital.If you bought a property for rental, tried to rent it, and held for appreciation, it might be considered investment property and you might get capital gain treatment.

Do not cut any corners or try anything fancy until you gain some experience. 

You realize this gain when taxes come around.