Not a pro, but some experience
There's a difference between being competitive and really going for it. Being competitive, you'll want weekly practices and then weekly meetings.
Weekly practices should include one person watching the others and telling them real time how to improve. Don't run a drill and then go take a break, rerun and rerun it until they're exhausted. Drills can be anything from two on ones, one vs one snap shooting, and break outs where everyone's job is to get to their primary and yet know where every opponent went too.
Weekly meetings should discuss the setup for the next practice and how everything is going to be afforded. If you want a sponsership from a local field (your post didn't have much on your current setup), work AS A TEAM twice a month at the field in exchange for free air, free access, maybe a bit of paint.
Always move as a team; you don't leave the field after a drill or game until you're together, you don't leave the staging area until each person is ready. Move as a team whether or not you like each other.
The flip side is the really going for it. In that case, get rid of someone without the finandical resources or basic skill sets. Friendship doesn't matter if you're really going for it. Set up a dues payment system with a certain cash amount payed at each meeting into a central pot that pays for paint, tourney entry, whatever. When you enter a tourney, everyone buys a case of paint but the paint is shared between all (backers may use alot more but they're providing the others with cover fire, so it all evens out).
Be prepared for the up and down cycle where you are either building a team up or starting a new one. Rarely do teams stay together for any period.
Just some tidbits, sorry if this is all obvious and known to you, hopefully something to help in there. By the way, I prefer the competitive approach of getting guys together to play without going nuts on the setup, but I believe in the really going for it in how I personally prepare myself to play.
Good luck,
Larry Janecka