Welcome to BP.
To start, read this article I wrote about land development underwriting:
Land Development Article: https://www.biggerpockets.com/blogs/9960/68001-lan...
Just to make you aware, your background in business is excellent, and will serve you well. I would say that land development and the real estate development business are very different from your normal business environments.
A few observations, when you plan out the site, plan the whole thing out. Given what I see, you'll want to map the entire project from the beginning, and have those approval in place from the start. Next, you'll need to finish the lots and record your final plat map, so you can sell the lots/homes.
As part of this, you'll need to:
1. hire a civil engineer,
2. have approved engineering plans prepared, plan checked, and permits issued,
3. pay the development impact fees and all other soft costs,
4. grade the site, and build the infrastructure for the project, i.e. utilities, street, drainage, etc.
You'll want to think long and hard how you are going to phase the delivery and finished lots, as you'll need to carry those costs with either your own capital or bank debt until enough lots are sold to repay that cost. Any common area facilities, docks, clubhouse, would be included in this upfront cost structure.
Once you've planned out the land development portion, you'll to decide: do you sell the lots to builders and let them build and sell? Or do you build yourself as the developer, as seems in your post, and if so you'll need to design, finance, build, and sell each of the homes.
If you sell the lost directly, best to find the best local land broker, and get the lost onto the market as fast as possible. You can also use platforms like LoopNet, Zillow, etc to sell lots directly. But your land brokers will know all the local homebuilders and have relationships that can be leveraged to get the lots sold as fast as possible, to pay down your lot finishing cost and land carry.
If you build homes and sell directly, you'll want to:
A. Hire the architect to design each home plan
B. Design, prepare CD's, plan check, and issue permits for the build
C. Hire a general contractor or builder to build the homes.
Many times, folks don't start actual const. of a home until they've sold it to a specific buyer, get a deposit, then start the construction. You'll want to be very careful about building speculatively, as you don't want to build homes that you cannot then sell quickly once completed.
D. Determine who you buyer profile is in detail, prepare a marketing plan, and initiate advertising or other marketing methods to get the word out into the marketplace that you are selling homes.
E. Set up a sales office, hire a sales agent with knowledge of selling new homes. Warning, this agent is not just any agent, they need to know how to sell NEW homes. Sometimes, a local agent can do this, but the process of selling brand new house in coordination with you the land developer and the homebuilder, is a major departure from selling an existing home, there's ton more to deal with and coordinate to have a successful sale.
F. Hire a customer service person to handle the post-close/post-construction warranty issues that always come up. You may be able to rely on the GC to do this, but getting subs to come back and fix stuff is a major time cost, and there is nothing worse than an unsatisfied homebuyer and a slow to respond subcontractor. The word gets out fast in the market when this happens.
G. You, the GC, and the sub will hold the long term construction defect liability when you develop this way.
Last, before any of this happens, you'll need to underwrite the deal, run a proforma, along with land costs when you purchase, you'll need to gather lot finishing costs, homebuilding costs, developer impact fees, soft costs, and finance cost, so that you can make sure the deals makes sense. That in fact, you'll actually make money.
Do this before anything, so that you can make sure you are making the most informed decision possible. I know many folks in general business that want to get into the development business, and end up losing money as they didn't do the math in the beginning.
Hope that helps.
~ Scott