There are Cash, Wraps, Seller Financing, Carrybacks, Contract for Deed, Lease Options and of course, FHA, VA, Conventional loans, HELOCS and commercial among other approaches.

Try to narrow down your options to the top 3-4.

and he's growing.. getting more purchasing power as he grows  so that he can offer discounted properties for his members.

Although I have knowledge and experience in my local market, I am most interested in some out-of-state options as I like those opportunities better than what I have locally but know little about where to begin evaluating those markets and the pros and cons of the different states.

They have various rates to choose from but I am still looking for a bank with better options.

Your budget of $600k would afford you a number of other options in the Myrtle Beach and North Myrtle Beach markets. 

I recently came across this "FHA construction to permanent Loan" option which seems almost too good to be true, so I wanted to get some input on how this works and where I might be able to find a lender.

They typically have high leverage so your equity would give you significant purchasing power.

I think owner occupied primary home financing can be some of the most favorable terms out there, especially with the low down payment option.

Options?