BOM and Overview

For this project I am in the works of designing a humidity chamber for controlling the temperature of popcorn. My goals for this is for it to be under 50 dollars and to not look like a piece of crap.
Parts
Sterilite 20 quart airtight container (could be any container)
W3005 Digital Display Microcomputer Humidity Controller 12V (x2) (13.68)
Portable Mini Humidifier (3.71)
Small Thermoelectric cooler kit (5.89)
Thermoelectric Cooler 12706 (3.35)
Power Supply 12V 5A (7.90)
DC-DC Buck Converter Single Square USB (3.60)
DC-DC Buck Converter 12V-24V to 5V 3A (4.62)
This makes the total cost 42.75$ (excluding the container and other mounting hardware such as 3d prints). I will work on finding cheaper alternatives but as for the time being these are the cheapest parts. I hope to order these parts on 03/08/26.