Keep me posted on what you are thinking and how you are going to execute and I will try to help you out.

How long should we consider holding off before executing a heloc?

A local manager would be much more effective, in marketing, pricing and execution, than Evolve. 

If not you may want to start there, it can really help with executing your vision.

Assuming there is a way to accomplish this with the ground lease or lease hold scenario, can I execute in improvement exchange to fund construction on only a partially owned piece of land?

Sec. 5.076 of the Texas Property Code states that “the seller shall record the executory contract, including the attached disclosure statement . . . on or before the 30th day after the date the contract is executed.

The more specific you are the better off you'll be. 6) Develop a plan of attack with a mentor. 7) Execute and teach others to do what you're doing! 

I have already spoken in person about the details, now just planning to execute the lease signatures.

The rent let them live in the house while they were paying it, and the OC bought them a specific length of time with exclusive rights to buy the property....and, yes, when the buyer decides to execute the Option to Buy, they need to sign a 3rd agreement...the Purchase Agreement (same as if they were buying it from the beginning), and get financing...just like they need to if they were buying it from the start.

Evaluate what strategy will help you meet those goals and what time you have to execute that strategy3.