Any ideas on forming a new LLC with him to build vs continuing to loan him funds and dealing with the bank perhaps not liking this?

Building a Phase 1-5 messaging campaign is the easy part.I'd recommend you build this yourself, so you can see what's working and what's not, and improve it over time with added features, automations, and complexity.

I’ll continue to gauge the interest and make a decision.

Sell: The home is stunning, with features like a 2-story wall of windows and a central, convenient location.

In case of continue the deal I would request and appraisal and inspection but still, as you mention, not sure if it is a good deal.  

It will only continue to be an awesome vacation spot just like Cancun has been. 

Here are a few suggestions on how you can maximize the wealth of information available: Check out the blogs and podcasts, or take advantage of the search feature (magnifying glass).

We will continue to observe the performance of this property and eventually will build a second house next to it.

We have never financed a car before and have always bought used, driven it and resold for higher than purchased price after driving a year or 2.Since reading on here, if we find even a 2020 Honda with all the features with low mileage and cheaper, yes that would work too.

By securing favorable terms upfront, I aim to maximize my ROI when selling within a 3-5 year window.I believe that connecting with like-minded investors is key to continued growth and success in this industry.