I suggest you go to your local real estate clubs and get more buyers there! You know, its like if you wanted to find a job really quick. You can go to several head hunters, several temp to hire agency, and you can put all these people to work for you - for not a dime of your money. Thats what I call people leveraging. When your at home, you are going to have several people calling you back to tell you about offers they have for you and you can then cherry pick the offers and take the one that best fits you. Real estate clubs are full of people who want to find you buyers - these people are called wholesalers. And guess what, you can have as many as you need. I say, work smart not hard!
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!