(Fixed for 36mo, no cap.) 25 Year mortgage. 

We originally had plans to rent it out after the remodel and move out into a apartment until we are able to finance a second property. but now I'm wondering if we should sell after the remodel and take half of the proceeds and re invest in either a fix n flip, or buy a duplex to house hack, or buy a single family to rent.

I don't think its a rental unit possibility but I see outstanding potential for a fix and flip.

I have a scenario where I want to do a fix-n-flip. 

However, now you (depends on how this Trump tax bill works out in 2019) can write off many things that deal with the rental property: depreciation, interest rate, fix and repairs, utility, traveling to rental unit.

I don't know what your plan is, to buy and hold or fix and flip.

I'm buying a auction home that I intend to fix and flip.

The Burlington, Greensboro, and Mebane markets are my primary focus at the moment and I’d eventually like to get into some fix and flips but for now my strategy is buy and hold for single family and small multi family.

Sometimes this makes it a really good option to sell after fixing it up!

Think fixed costs like plowing, roads, taxes don't have as much room to be spread around so might be a few expense percentage points higher. ( and you will always want to hammer down on actual numbers).