As a flipper, this will also be helpful to buy and sell your own houses.

Because the vast vast majority of potential sellers are homeowners (not investors or developers selling new), and will have to find another home in which to live.

Also on Foreclosure rescue if folks in the Northwest new they had to give up to 80% of their gain back to the person you bought it from if you sell it in a few years..

Anyway, now we are trying to decide whether we should sell or continue renting it out.

Your other options are to sell it or give the lender back the property. 

If you sell them, it just means that you cost basis is lower, and you earn more profit (which was the point of doing the labour yourself)... 

@Chris Seveney is normally correct here in that "most" people making 6-7 figures are simply selling courses. 

I'm not exactly excited for my funds to be tied up for a year while the house is being built but I could borrow against myself (TSP - government employee) or sell some stock/use some of my cash ~$130k.

this area is appreciating substantially if you can buy bmv, or fix the duplext and sell in couple years. 

Will your identified markets be an easy or difficult area to sell once it’s time?