@Vincent MooreHey,I would calculate the interest you pay in both scenarios whichever is lower wins.

After we sell the property we will splits profits as agreed upon, (30/70, 40/60)whichever.

After we sell the property we will splits profits as agreed upon, (30/70, 40/60)whichever.

Another idea is to open a brokerage / investing account with whichever company also holds your 401k money, and put your "savings" into a total market index fund or into the S&P 500 or some other index fund that spans multiple industries.

The repayment terms for a 401k participant loan are equal monthly/quarterly payments of principal and interest (typically prime plus 1%) over a 5 year term (longer if used to acquire your principal residence).Please note that if you take a full $50,000 and then pay back the loan, you can't take another $50,000 until 12 months after the first loan was fully paid back.Per the loan offset rules that went into effect with the 2018 Tax and Job Act: if you leave your job and the loan is current at the time you leave your job but then the loan goes into default because you left your job, you will have until your tax return deadline (including any timely filed extension) to make the loan current by depositing the outstanding balance into an IRA (and thereby avoid the taxes and penalties that would otherwise apply).Please keep in mind the multiple loan rules:Under those rules, the sum of the balances of a participant's outstanding 401k loans under a single 401k plan (using the highest outstanding balance of each loan over the last 12 months) can't exceed 50% or $50,000 whichever is less.

If your annual income and your net worth exceed $100,000, you can invest up to 10% of your income or net worth, whichever is less, up to a total limit of $100,000.

Then with which ever comes first- At the end of the 90 days or if earlier upon receipt of a certificate of occupancy and them opening the doors the rent would begin then and the build out period would end.

Whichever route you choose, what's important is that you have all of your finances in order and are prepared (mentally and financially) to invest when you decide it's time. 

Whichever path you choose make sure you vet your resources..

I was also thinking/fantasizing of putting a sign in my own home that says, "Surveillance free zone - check your cell phones at the door" - lol - or more to the point, "Free Speech Zone - All Devices Prohibited - Speak Your Mind As You Will".