Visit www.part15.us for more information. Most of the information is quite technical but I have a thread here which generalizes some of it. Currently, disregard the DRM portions:
If one uses I A.M. Radio's gear at ~ $500 per installation, you'd probably need at least 5 installations at a cost of $2500 for the equipment. Understand that these TX are very low power and DEMAND excellent locations which naturally include height above surrounding terrain. Each TX could be located in an individual's home as the units are small. The antenna is simply a monopole (fiberglass whip) about 9' in height so it MUST be hoisted into the air for clean reception. However, hoisting the antenna into the air brings some limitations with it, e.g. no PHYSICAL ground if more than ~ 1' above the earth. Yes, regulation is covered under Title 47, Part 15.219 specifically. See the website, www.part15.us for more information. Any staffing would likely be technically oriented volunteers so costs associated with personnel would be minimal. For regional campaigns, some computer link would be required to coordinate information before it could be broadcast locally on the MW (AM) band. It is legal to solicit advertisers for your station. Finally, under Part 15 rules, the broadcaster must not interfere with a licensed, i.e. "normal", station. Simply scanning your area for AM broadcasters with a receiver should identify any local broadcasters for you to avoid. Furthermore, as an unlicensed Part 15 broadcaster, you must be willing to accept interference. Therefore, any publication of AM frequencies should include several alternate frequencies, e.g. 520, 1650, 1690 ... up to 1710 KHz in case of transient interference. Naturally, your station will only use one frequency at a time.