I have been in touch with the folks at Real Estate Sales LLC and FlipCheapHouses.com.

We have discussed forming an LLC to make such an investment together (e.g., we, as an LLC, would be one of several investors in the syndication). 

Based on what I have heard/read thus far, it seems like I don't need a formal legal structure such as LLC for running this is as an active business (but I may set up an LLC for asset protection, which is allowed by my mortgage lender).

Treat income and expenses separately, treat owners like owners, treat occupants like occupants.Unit B should be owned under an LLC with you and the co-owners as partners.

Proceeds to be used for 1031/DST, LLC would then be owner of record for 1031/DST. 

That LLC is owned by my sister, myself and our father. 

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.

I just got a PO Box for a non real estate LLC.

Does anyone have advice regarding doing a 1031 exchange, where the goal is to take title back as an individual and dissolve the LLC that the relinquished property was held in (without triggering a taxable event)?

Also, should it be a separate LLC for each house?