My question is, is it bad if this person could potentially get married in the future or would a prenup protect any property that is accquired during the marriage that's a part of the partnership?

You'll have a challenge to balance your time between the rehab and the new marriage.

Perhaps the flip route is safer with regards to not having those long term, marriage commitments.  

There are still issues here, common law marriages, estate issues, heirs, as a lender/note holder you may be able to clear these issues with foreclosure if the folks don't fight you on it, but you'd be selling and excess amounts would go to the estate, who could give a deed with that mess?

Sort of like saying, if you don't get sex on the first date, or a marriage proposal then stop dating.With that being said, clubs are work and take effort.

She is definitely my #1 priority and there's nothing in the world that's worth risking my marriage or her sanity! 

So far: quarterly % change in Real GDP, YOY % Change in Monthly home prices, job growth, interest rates, population shifts, rising wages, area revitalization, relocation, marriage, family growth, divorce, death, debt, active inventory, sold homes, avg. sold price, average days on market, Concentrations of jobs by occupational category, average level of education, school rankings, crime, appreciation, property tax rate, state tax rate, positive/negative RE legislation, monthly rental income, average age, inflation, popular property types and configurations, vacancy rates, volume of rental units added to market, time to rent, months of supply, volume of new home construction. 

@Chad Johnson, would you like to go 50/50 on a pretend-marriage first flip?

I was thinking about trying to scrape data from probate court about marriages, births, and deaths for marketing campaigns. 

I don't care what the game is there will always be losers: homeowners, speculators, bonds, stocks, gold, oil, marriage:), RE investors....and the ones that plan well have the best chance of survival.