That is your grandfather will not have his name on any one loan or have direct recourse to any of the properties; the LLC will, and the profits are split in proportion to his ownership.

If you are financing a commercial property, the Loan To Value that a lender will give you is directly proportional to income.

I would look into these guys https://www.submetersolutions.com/If that doesn't work, just split the usage based off square footage and charge the tenants in proportion to that - not 100%  accurate but good enough.

I get a proportion and he get his.

Our goal in RE is another income stream for our retirement, and to keep the same proportion of our portfolio in RE. 

And a hint on proportion?

Double my money with interest annualized 15% interest for the duration of the rehab until sold.Contingencies:The property needs to completed within 30-45 days, put on the market, and sold by 60 daysMy solo 401 K is the second lien on the property.The property if not sold within 60 days the GC shall sell the house to me for the negotiated purchase price of $ 270,000.00 Property to carry umbrella policy to replace man-made and natural calamities.Should the cost overruns increase the lender's equity will proportionally increase.Is this a win-win for both parties if the deal goes south if the GC doesn't keep his end of the bargain of completing the project within 45 days and not sell in 60 days?

Or is some portion of the principal received from each payment considered income as you go (and if so, is it proportional to the discount you bought the note for)?

Your IRAs partner will guarantee the cash-out refi, the money will come back to each participant proportional to the original investment, your IRA will get the cash, and your partner will take his.YOU WILL NOT take the cash personally.

There is no minimum, its just whatever portion of the marketing money you put in, you get a proportional share of the leads.