Are you currently under contract on a property?

In the end, a lease is a contract. 

Your Dad very likely has your best interests at heart and might just be a little hurt that you would be more interested in taking advice from strangers rather than from him.

My lawyer (thank god) absolutely insisted that the Bulk sale Act or Bulk Sale Contingency be included in the contract.

If you agree on price and your buyers are approved for financing, your attorney relative should be able to set it all up including the contract if both parties are comfortable with terms. 

The side contracting job brings in additional income but the amount isn’t consistent each month.

It has done so in the past several times.Money, especially fiat money of the type we have today is simply a private contract between the lender (depositor) and the borrower...

A better strategy I have heard from folks is that the builder might buy you out of the contract at something like half of the full amount (difference between your purchase price and the market) to avoid having a new never lived in home on the market at less then their asking price for the same model. 

I found the Louisiana contract online and a title company that helped me get it set up. 

My understanding is that in the lease option contract, to avoid equitable interest issues, you can’t say that the option fee is any sort of credit or down payment toward the home.