I have the luxury of working from a home office (most of the time); and I "only" have 2 panther chameleons so far... so I have gotten by nicely with the a hand sprayer/mister (it's time consuming but can be nice bonding time with the chameleons), but I have bit the bullet and my MistKing should be delivered tomorrow and I am so very stoked....
If you do stick with the hand misting, my recommendation is that you just make sure you 1) are religiously consistent several times a day (for more than a couple of minutes per cage); and 2) at least spend $15-$20 at Home Depot or Lowes for a 1 gallon pressure sprayer that will give you a nice long consistent and fine mist ($2 hand pump sprayers = futility and in my case burned and blistered hands after a couple of weeks - just not worth it IMO)....
Really a personal choice, but of all the equipment and feeder supplies I have forked out for my babies so far, I am most excited about installing my MistKing this weekend! Just my 2 cents....