If I understand correctly you'd be purchasing the land, and improving it and splitting it into the appropriate "buildable lots". 

Focus on value-add properties where improvements like renovations or better management can increase returns.

@Richard NguyenHere are some of the downsides of putting real estate into a self directed IRA or 401k.No tax deductions: You can’t claim deductions for property taxes, mortgage interest, depreciation, repairs, improvements and other property-related expenses.Property expenses: All expenses, repairs, and maintenance costs must be paid with IRA or 401k funds, and you must pay others to do repairs and manage the property.

I went to Google and searched for "New Jersey purchase agreement" and came up with a lot of options, including the official REALTOR contract.

Go to Etsy and search for "rental property tracker," and you will find hundreds of nice spreadsheets to track 10-20 rentals, usually for under $10.Software has extremely helpful features like online payments, marketing syndication (click a button, and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.

This is more about riding the wave of a growing market.2.Forced Appreciation: Actively increasing a property’s value through strategic actions like renovations, raising rents, or improving operations.

These are typically located in lesser-known vacation rental markets, but have very strong fundamentals and great room for improvement. 

Here are key factors to consider when searching for a reliable broker.A good private money broker plays a pivotal role in facilitating real estate investments, serving as a bridge between investors seeking capital and private lenders willing to finance those investments.

Anyways, hope that helps some with your search.

You would want to start with searching on YouTube for: "Clayton Morris Loses $7 Million Lawsuit" He didn't realize that @James Wise had his ish together and got a big wake up call.