dont use those dripper systems, they work like crap...and they overflood the enclosure. Personally, i wouldnt pay 250 for a sprayer, when you can pay under 100 for a good one. I dont know where to get them, but 250 sounds way too much. Try searching the internet for some top misters/humidifiers...if all in all fails, than go for it. Its your choice.
ps- i know how you feel about spraying a 5 foot enclosure! I keep a giant day gecko in a 5x3x3, and im trying to find a sprayer also ;)..., your not alone!