If youre providing seller financing, youll still need to draft a deed, but this deed will be held in escrow until the final payment is made. Once that payment is made, the deed will be filed with its respective government agency, typically the county clerk. You can have an attorney, title agency, or a financial institution hold the median in escrow for you until the buyer makes the final payment.
Just like you'd stage a home, you want the vacant land to show at its best. A lot overgrown with weeds is going to look less desirable in the eyes of a potential buyer than a lot that's apparently cared-for. Professionally trim trees, mow grass, remove weeds and perhaps plant wildflowers to show the property at its best. Visit the property weekly – or hire someone to do so – to remove windblown trash, beer cans, fire rings or anything else that might detract from its curb appeal.
You can also look to certain companies and organizations that have a concentration of people that may fall in the above mentioned roles such as investment companies (i.e. Charles Schwab, Fidelity), financial advising companies (i.e. Morgan Stanley, Merrill Lynch). There may be a higher concentration of people who can both afford and want to build their own custom homes or to build income-producing properties. Try linking yourself to financial advisors who may already know of people who have these types of dreams. This isn't a comprehensive answer of all the possibilities but just some thoughts. Good luck!