According to an article by Michelle Bradley at RecNet, the FCC allows Class D non-commercial FM stations limited to 99 watts ERP with a coverage area identical to an LPFM station (100 watts). Such stations are limited to Alaska. There is no filing window to wait for although an engineering firm to conduct a frequency study is required. Such stations would cost about what a LPFM costs to begin and have very low monthly operating costs just like LPFM. Literally you could begin today starting with hiring an engineering firm. Naturally you must be established as a State or Federally recognized non-profit organization to qualify for a license. You'd need an educational slant to the mission of the non-profit as Public Radio radio stations are licensed as "Non-commercial educational". It can be as simple as "town music appreciation society" to expand the understanding and appreciation of music as a form of communication within society.

Your 60 dbu coverage is going to be about 3.5 miles from your tower. Taking the LPFM model: 100 watts at 100 feet above average terrain, the higher you go above 100 feet, the lower the wattage. An average station might be in town with a 50 foot antenna. In the vacant FM dial of most of Alaska, depending on terrain, you might reach 20-30 miles. The LPFM in Paisley, Oregon, a place where this is the only station received on the FM dial, achieves a 20-30 mile range with 100 watts at a negative height above average terrain.