Plan of attack, and if you haven't considered any of these points then you're going to want to go back and think long and hard about it, this isn't an overnight thing, and it's certainly not easy for the return(s):
1. Find a field. (Bearing in mind you're going to want a nice flat grassy one, and those are usually reserved for other, more profitable things)
2. Construct a 'safe' netted field area. (If you're using poles or any permanent system or attaching netting you need planning permission, which can take a very long time to sort)
3. Get yourself a sup'air field. (Simple 5man field may do to start, but bear in mind you'll only attract bigger teams/the masses with the latest Mills' field)
4. Sort out air facilities. (Dive tanks don't really cut it once you start getting a couple of teams there who want to actually get a full days play in)
5. Paint (It doesn't grow on trees or spring up from the undergrowth, and most teams don't turn upto training with their own, they expect the site to have some for sale)
6. Storage. (If you don't want the local underlings from coming around and pinching everything, you're going to need some permanent storage facility on-site, or, large enough vehicles/trailers to take everything away with you)
7. Bunker cleaning bits and bobs (Simple really, but it's the little things)
Then, once you're up and running, you have the one huge thing that most people seem to miss. You actually have to set-up, clean, pack away, and look after your main assets; the bunkers. No more turning up to find the field magically up and looking perfect, and no more leaving at 4pm, you'll be there until 5, whether it's pissing it down or going dark; everyone else will be home and getting warm after a poor days weather, but you'll still be slogging it out rec-site style.
Then on top of this, you'll have the critics, and the people who no matter how much effort you'll put into your site, they'll knock it for some reason or another. Might sound silly, but if you can't take some 'constructive criticism', forget it.
Speak to Markie C too as someone already said, his site near your area had to close recently.
If you've considered all that and anything else I may've missed, and still think it's actually worth the effort, then goodluck to you!
