Since you did leave and your sister made up for the mortgage payments (and receiving the benefit) you may want to figure out how much equity they continued to contribute when you left the country and what that amounts to.

We can also see if it was paid by cash conventional or FHA/VA and if there were any seller contributions.

When we set up the LLC, we wrote the Operating Agreement specifying the capital contribution amount -- $500k total, $250k from each person. 

While I understand the premisses of the notion, I still don’t quite understand how that works.

Here's the likely situation: My Contribution: Find the Deal/Property, Run the Numbers, Present to Investors, Oversee and manage my existing & reliable contractor, master electrician, plumber, lender etc. to perform the work and rehabs, and refinance. 

I work as an tax accountant and have independently researched the issue of Self-Directed IRA's as a matter of both professional and personal interest.You not only can have a self-directed Roth IRA but you can also have a self-directed HSA and even a self-directed Coverdell Education Savings account (although the small contribution amount allowed for this one limits it to niche applications). 

We are definitely seeing increased demand of both primary homes and rentals in the DFW market with the business friendly environment and continued population growth contributing to a short supply of inventory.

All these factors contribute to this face: "Florida has seen one of the nation's biggest upticks in the number of new residents, according to new U.S.

Will these contribute any?

There was one minor sticking point which contributed to the delay (but was not the main reason for it): I applied for COVID-relief forbearance with one of the properties to de-risk my ability to pay mortgage when a couple tenants weren't able to make payments.