I am in a similar situation where for estate planning purposes I have ownership interest in three properties, but do not derive rental income from them or pay for the taxes or HOA myself, but every mortgage I've applied for used the taxes and HOA fees in my DTI calculation. 

I am a long time customer who has derived immense value from their product.

This was derived from talking to local PM company’s, my realtor, talking to sellers and an online expense sheet for a mutual family.  

"Source of income" does not include income derived in an illegal manner."

Derive at least 50% of gross operating income from activities in an Opportunity Zone,2.

Do not dismiss the "encouragement factor" that you will derive, simply by being around people who are already doing the exact same thing, that you are trying to do.  

It it not entirely clear what your question is.Taking a shot in the dark, Unrelated Business Income Tax (UBIT) applies whenever a tax exempt entity (Solo 401k, IRA, or any other type of non-profit) engages in a trade or business on a regular or repeated basis. refer to IRS Publicaton 598.Income derived from passive investments such as rent from real property, interest, dividends and royalties is not subject to such taxation.UBIT was created by congress long before IRA and 401k plans existed, to prevent tax-exempt entities from driving taxpaying businesses out of business.  

For now, I plan on keeping my deals broad to derive what I truly enjoy and what my market primarily supports.

From the NOI we derive the cash-on-cash (c/c) and for  clarity, that's the NOI divided by your real cash down payment ( noi / dp). 

I suppose business plan was not the right term to use in this instance, what I am really writing up is an "investment criteria" breakdown and how values will be derived.