New Idea for my Moisture Device! Please Help!

Hey, so thanks for the advice guys! Really helps. So I was hoping for the range of $30-50 but I don't know yet. and the size is the key feature for price. Bigger or smaller units will cost different amounts. This is obviously dependent on size of the humidor. But on the survey thats why I ask what you would like to pay, cause I mean realistically its you guys who will be paying for it.

Thanks for the help. Keep it coming please. Also feel free to email me directly!