If you have equity and decent credit, a conventional Fannie Mae HomeStyle (or the Freddie Mac version) would likely be the better option instead of an FHA 203k loan (which will require a 3rd party HUD consultant to oversee the deal in addition to having the contractor involved). 

Try to get an extended closing and/or options to extend the closing until you are ready to close on the sale of your relinquished property. 

There was no "assign to property" option and basically I had to re-add their profiles to assign them to a property, which was clunky.

I’m not sure what is the best option here, if anyone could shed some wisdom that would be immensely appreciated. 

I know there are a lot of options, especially since they are family and willing to carry the loan. 

.), so I'm seeing what other options there may be. 

Your suggestion to list on open market likely is the best option for the OP.  

You might have other options to explore to drum up liquidity (HELOC, Margin Loan, Policy Loan, etc) that can supplement your HYSA in the DP.

If a HELOC isn't an option due to Texas laws, you could consider a cash-out refinance with another property or a portfolio loan, even if you want to keep your current rate.

Quote from @Catherine Ding: My PM company is offering to do it for a high fee of $100/month so I'm trying to find alternative options.