Not really sure that is considered investing... that is spec home building and can be a far cry from investing.
What is you objective?? to build homes, or to make money?
If you buy land... pay for building home (or for supplies if you are a contractor) and then selling it.. your ROI (Return On Investment) is typically very poor because your COC (Cash On Cash) is so low because of your out of pocket cost or lender obligations. Unless you are a Major Developer, working many homes at the same time, your chance of making good money on building and selling a single family home in the Central Florida area would not be considered investment by most real estate professionals... a hobby at best with very mixed expiations.
If your goal is to make money in real estate, many Far Better methods are available, depending on your skills and knowledge and desires.