I think that is very normal for an entrepreneur but working out and staying healthy helps me with my sleep. 

Adding a taxpayer, if held in joint tenancy, would not be allowed in an exchange because Property B's ownership would differ.Tenants in Common allows individuals to have an undivided interest in property. 

Or, the agreement could be written up differently but still have a Note & Mortgage & Escrow and Title for lots of various reasons. ( Good practices)Another option would be a Joint Venture per property.

Proc. 2002-22, If an entity, LLC, is in a joint venture with another person, there will most likely be a partnership.

I am trying to help a previous client avoid a healthy capital gains bill on the sale of their primary residence. 

You could easily make 10% - 15% investing as a joint venture money partner or by acting as a bank and lending money as a mortgage.

If not and you are trying to work out a JV as it seams then fill out a JV contract with the GC to cover your basis and open a joint LLC bank account and just split the equity/profit share at the end of the project after all expenses and expenses are paid for once everything goes as planned then give the bonus.

Our taxes are filed as married filing jointly.

A $73k sale price puts us at a healthy ROI...time to move on to another project.

The problem comes with the interest rate - you will bleed a lot of your potential income to the lender.Partnership/joint venture - consider spreading the cost of a property over multiple people.