you want a drill with a native grass box (like a Truax Flex-II), not just a grain drill. Grain drills without native grass boxes can’t adequately meter grass seed because the seed is too small.
NRCS used to have a Truax drill and probably still does. They charge like $10 per acre with a minimum 10 acre rental, or something like that. The drill has an acre meter on it. Your tractor will need one set of hydraulic remotes To operate it.