They get paid by the sponsors.

Lets assume you could sell the home for a $200k profit over what you paid.

I did not upgrade but about 15 people did.Was it worth $250 that I paid?

The low risk requirement eliminated lots of investment types like trading crypto, venture capital, ultra high leverage real estate deals - except for maybe a very small percentage of my investable assets.Since I’ve already accomplished tax minimization by managing to hold the majority of my assets in a retirement plan and paid the taxes to turn that plan into a Roth, number 4 is not a concern.I do invest for current income as second place to wealth preservation, and increase wealth as third place.

It is all paid off.

Your closing costs usually include Title insurance, possibly lenders title insurance if your HML requires it, you'll pay their points/origination fee, prorated interest for the month possibly appraisal fees or other fees your specific HML require and sometimes the appraisal is paid out of pocket ahead of time. 

It tells you how much interest you paid on your mortgages.

Maintain proper records - Contracts, Settlement Statements, Agreements, Promissory Notes etc.Additionally, youcan track income and expenses consistently, using software or spreadsheets.As you scale, ifbookkeeping isn't fun for you, consider hiring a bookkeeper for a couplehundred bucks per month.

You will report your rental income and expenses on Schedule E.

Once you have a good estimation of rents that is your income and you can calculate the other expenses an ultimately your returns.