Would you buy a property where you have to give half the profits away for life? 

Sold it for a profit fairly quickly.

When the time came to sell, I anticipated a solid profit from the deal.

Offer aid and housing options if you're able -- don't try to profit. 

I've never heard money/profit described as cute, so it's not important.The most important thing you mentioned, was the rent potential and ARV. 

I have 2 options:- finance the construction pre-selling the apt, and take my profits (expected to be around 700K pre-tax); or- finance the construction with a 6-7%/year loan (collateral = my house), keep the 10 units, and once the building is completed in 24 months, rent them for circa 180K/ year gross.

I know for our portal in Buildium owners can log in and run different reports like income statements, profit and loss, general ledger, etc.

@Ashly FrassoRenting by the room can be a profitable but complex model.

He's got his money back already and the remaining amount due to him is only profits.

Most lenders I work with would lend you 70%-75% of the value of the property, but only so much that your NOI/profit is 20%-25% of the monthly loan payment.