If the other two parties want to flip a house maybe they can do just that as partners and then sell you the house which you can buy with a primary home loan with low down payment.

I bought and sold old houses for 10 years.

Your house loans will be long term say 25 years.

This might give a one-time (non-scalable) boost to cash flow, offer multiple value-add options, and allow the house-hacker peace of mind, via the assumed mortgage, in long-term breakeven or positive cash flow in the event that the value-add plans end up not being executed, and/or the person has to move out, and rent by the room or STR become unavailable for some reason at a future date.

Personally, I think I would stack some cash for a year or so while I did this. 

Even if you only averaged 2.8% appreciation annually, which if you've had it 20 years I have no clue how that's true given prices have well more than doubled in that time, youre skipping over the fact that you have been benefiting from that appreciation on the ENTIRE house, not just the % you paid for.  

If you are single or a couple on the same page about house hacking, look for uneven multis.

When you say "we," are you speaking about your business or your personal tax returns, or does your business flow into your personal returns because you file as a sole proprietor?  

Not only does it have excellent potential as a house hack, but it also offers significant upside for a live-in flip.

The Importance of a Great Real Estate Agent: A Personal Paradigm ShiftI got my real estate license a while back, and I always heard people talk about the importance of "bringing value" as an agent or broker.