If all parties have signed then ownership has just transferred regardless of collecting the money, that will come eventually.

Next, is finding a value to the property and ownership - are you able to get and idea of the cost of rehab?

Most real estate attorneys should be able to set this up.The title stays cleaner and the chain of ownership is clear.You will avoid paying huge fees.Check out private mortgages here on BP.

One of my first real estate agents (back when I used one) taught me a lot about "pride of ownership" and what kind of tenants you get, especially in lower-income areas.I have received significantly higher monthly rents, and better-quality tenants than the average tenant in my lower-income neighborhood in the Bay Area.

I heard on the radio a bit ago that home ownership was at a 20 year low as well.  

No substitution of ownership without unanimous consent except in case of death(or not).No payout of profits without unanimous approval(or not)What to do about bankruptcy, death, buy out, incapacity, or even disagreement.  

I know I can fairly easily access the $50k via a loan in a self-directed 401k plan.... but would I also have the option of using my full balance from those funds and splitting ownership of the property between the plan, my LLC, myself personally, etc???

So what percentage of ownership/equity do you typically maintain when you pull all of your money out by bringing in an equity partner?

Bigger goal: I want to get to a 10+ unit ownership in the next 5 years.

This is not a DIY thing to do.And, you also have the option of her assigning the property to a tenants in common ownership with you and the heirs with a "TIC Agreement" allowing you to purchase the property from other owners.