From page 730 (emphasis mine): "All non-business tax deductions and exemptions that were temporarily suspended by the 2017 tax bill should be permanently repealed, including the bicyclecommuting expense exclusion, non-military moving expense deductions, and the miscellaneous itemized deductions.23 The individual state and local tax deduction, which was temporarily capped at $10,000, should be fully repealed.

I would like to assist two of the owners find a buyer for their parts of the business/real estate.

You may already know this (you should know this), the JADU requires owner occupancy on the property to be rented as an individual unit.  

If a cash out refinance, many lenders will allow the cash out to satisfy the reserves requirement.DSCR lenders generally let you vest either individually or as an LLC.

As a self-employed 1099 individual, your best route is most likely DSCR.

Occasionally, I assist fellow investors in finding suitable properties.I have two clients who are business partners who are interested in making lowball offers on various listings.

As someone who moved to Waco from Miami just because my wife got a senior position in Magnolia, I've met many families and individuals who have come to Waco from LA, NYC, Seattle, etc. just to work at Magnolia, SpaceX, Baylor, and some big churches in town, such as Antioch.

These are some options that I am considering. 1) Getting an LLC and a Joint Venture agreement to partner with a long time friend of mine but somehow separate our business from our individual marriages?

@Nold R.In addition to the great post from Dave, possibly consider an option where the property is taken out of the LLC sooner rather than later and held as tenants-in-common prior to the sale, possibly setting you up in a position to take your share of the proceeds and individually purchase a replacement property via 1031 exchange. 

Quote from @Austin Schubert: Quote from @Chris Seveney: Quote from @Austin Schubert: Would anyone have a sample template of a proposal that you've used in the past that goes over how your structure a deal with a private money individual?