If you loved me, you'd buy me a ball sucker:
I will also require a ball washer:
"Move balls from one ball bath to another or create a ball fountain! You can combine it with a ball washing machine, so that your kids will play in heaps of hygienic balls!"
See to it. Thank you.
(See, when we were first talking about getting a bouncy castle, I instead wanted us to just get enough 4" plastic balls to fill the entire ground floor of the club to a depth of about four feet. But, we couldn't find a place that sold those balls for less than about 5¢ each. I figured that'd take around 300,000 balls, which would have been $15,000, not counting shipping.
And then what do you do with them? I favored just opening the door at the end of the night and setting them free on 11th street, but someone might have noticed.)