Community Bulletin Boards business. If connecting diverse people is your forte, a community bulletin board may be a good business for you. Business Overview High quality 4-foot by 8-foot wall-mounted bulletin boards can be built for about $250 each, and spending $10,000 to construct 40 bulletin boards has the potential to return advertising revenues in excess of $20,000 each month. How? Easy. Simply secure 40 high traffic locations such as food markets, malls, and recreation...