I guess I really just want to gain experience so I can provide value to others in the industry.

Predator lawyers are everywhere, in all industry's, and it is something that you need to be aware of.

After scouring the market, I was able to get large builder financing and discount incentives that allowed me to buy the property at below retail price and get good financing terms.

His expertise, industry insights, and personalized support have been great in my growth.One of the most significant positive results I've achieved from the mentorship is the ability to identify investment opportunities and make informed decisions.

Indeed, the good ones I've used tend not to have a particularly high view of their colleagues in the industry

What is the retail value of the house you would sell?  

This is fairly common within the industry and a way to reduce administrative costs considerably since you’re not repeatedly negotiating the base terms and conditions of the contract.

I know some very big players in this industry, millionaires many times over, and they are not close to $400k monthly net on payroll.

What advice would you give a newer investor (with rehab and buy-and-hold experience) transitioning into the land development/building industry?

Real Estate is a very litigious industry especially when dealling with tenants.