[HoDeDo]

Dave nailed it...
if capacity is an issue, it is hard to beat a Kingfisher... with the additional racks, they hold a ton of food, and are mobile. They are also a rotisserie, which helps via self basting,etc. they turn out great food.

The FEC's are the utmost in "set it and forget it" -- they will cook, and then hold. And they cook the same - all the time - cold/hot, rain/snow.... rock solid. I can leave in the morning after putting a load of butts in at 200 - come home from work and pull them out, cooked to perfection. It will not hold as much, but requires less tending, so you might still get more cooked in the same amount of time...

You can get an FEC for almost 2K less than your limit... so you should be able to set it up on a trailer however you like for under 5K (if you need the trailer.)

Dave gave you a link to Bob at KCK.com. He's got Kingfishers, FECs, Southern styles, etc. He might also have some ideas for you - if you tell him the specifics of what you are doing. He knows all the cookers inside and out. He also typically gives Brethren a nice discount. I believe it is 15% currently.