Did you consider giving the grants to several organizers working part-time with one group?
Some arguments against:
It's more difficult to coordinate with multiple people
Organizers need to coordinate with each other
The required skillset is very rare, assuming each organizer needs to perform well w.r.t all of the skills listed.
Some arguments in favor:
Low transferable career capital (outside the EA community). Some potential candidates expressed concerns that working full time would require them to interrupt their studies. Working part time would
Cerasoli, C. P., Nicklin, J. M., & Ford, M. T. (2014). Intrinsic motivation and extrinsic incentives jointly predict performance: A 40-year meta-analysis.