Can you elaborate on getting a Part 90 license for the church? Would this cover everyone?
GMRS requires that each family has a GMRS license. If they won't get their licenses, then your church would be using GMRS frequencies against FCC rules. Probably not a good idea. A church or other non-profit is not exempt from the FCC rules under any circumstances.
MURS does not require applying for an FCC license, it's 'license by rule', which means that as long as —everyone— is following the FCC rules for MURS, then they can legally use it. However, it's VHF and limited to 2 watts. Probably not the best choice for use inside a building. You could try testing VHF on 2 meters since you have your ham license. Ritron makes some solid MURS radios.
NT Series, MURS/VHF/UHF, Ritron 2-Way Radios You would need to order the NT-152 in the MURS variant. These would be legal.
Coordinating a UHF frequency would be the correct way to do this. You would need to contact an FCC authorized frequency coordinator and tell them what your need is. They would identify a suitable UHF frequency and process the license. With that license, the team could use the UHF frequency the church is licensed for. However, FCC rules —require— using a properly type accepted UHF radio. Not all of the Cheap Chinese Radios meet those requirements. Anyway, cheap Chinese radios are not going to perform as well as a good quality radio. Kenwood NX-1300 hand held radios would be my recommendation if you want something that works well, is legal, and will last more than a few months.
FCC Licensing - RadioSoft <— they will take care of all the details, including submitting the correct paperwork to the FCC. The process is different than hobby radio services, so enlisting the help of a professional will save you a lot of headaches and possible legal issues.
