I want data that is evergreen: when the house sells the new owners mailing address is updated, Somehow gather all "list"  combined, stacked, updated and output daily.

If you lived in the small 2/1, 450 sq ft unit, you could rent the other two units out for a combined $2,025.But even with 20% down your PITI will be $2,438.98 per month, leaving a balance of roughly $415/mo you'll have to pay AND include your share of utilities, etc.

I can combine this calculation with a sensitivity test to determine the max offer I can make according to the term and interest rate on a seller carryback.

If the applicants are related (blood, marriage, adoption) then we combine their income. if they are unrelated and there is more than two of them, each individual must make 2x the rent.

One room even had a crawl-under space.ARV of both homes combined would’ve been around $140k when all set & done.

They will be able to make suggestions for you - and combine different lists. 

That's probably pretty easy to compare with how much your properties appreciated over the last 12 month period and how much you expect they will appreciate in the next 12 months compared with what you expect adding another property will net.By combining several properties into a portfolio loan you might even find it's easier to find funding than if you wanted to place debt on them individually. 

If all looks good we can schedule a showing any day. 1.What is the combined annual income (all applicants) that can be verified?

You've somehow combined a Lease Option with a Land Contract...kind of...almost, but not really.

Trying to address the needs of a group of individuals located in different states, with varying skill-sets, diverse levels of experience, and distinct (and often unstated) goals and objectives is a recipe for confusion, frustration and stagnation.Rather than combining your interests into a single business entity, I would urge you each to create your own individual entities and then come together, as needed, to take down deals that specifically require collaboration.At very least, I would suggest that, before spending even one minute on legal documents, you all come together as a weekly MasterMind group for a month or two and see how that goes.