I am finishing out the interior myself (DIY): Insulation, Drywall, paint, cabinetry, and tub, buying material bit-by-bit every payday to get the main unit habitable, rent it out, then refinance.

My plan is to make the 401k loan payments, tax payments, personal payday all with the flip profits and recycle the rest of profits into the next flip.

We estimate that we'll need about $40k to pay for the next 2 remodels, and my partner could use a payday of ~$15k or so for his labor on the first remodel. 

If i give them choices to pay partial on pay day then i have a better likelyhood to get the rent...

The contract cannot be more clear and it is more clear than the contract on the back of a pawn broker or payday loan company receipt.

If you sell, you'll lose that rate and payment but you'll have a payday...how will you reinvest the gain/proceeds? 

Yes, this predatory college debt machine has become the pay-day lending bane of the middle class.

I had a friend whose parents held onto a piece of vacant land zoned for commercial use for 20 years. they finally did get a big 1mil+ payday-- a Carrabas was built on the property.

When we sold it, we walked away with a 6-figure payday.

If you have $100k in equity already (after resale costs), then you can do a lot more with that than some tiny cash flow.On the other side of the coin, you should find out how much expected appreciation this home may have as well (no way to know for sure but law of averages for area can help) as this could be a good payday down the road if you add it to the small cash flow years down the road.