Hey there!
Target sells a large clear tub that you can fit three shoeboxes in right next to each other.
I currently have the tub set up with a seedpad as well, and six bags of UBs on a little shelf set up. Pic 1 Pic 2
Once they are fully done, I'll be able to S2B right in the container, inside of three shoeboxes.
A few things to note:
I have since the original set up, made two changes.
There is now a fan that turns on when the pad turns on. They helps circulate the heat, which is fantastic. I bought a DC to 4 pin PWM fan connector, and am using a normal PC fan.
I have since moved the bin to a larger grow tent(This one) as my bags are nearly ready for break and shake, and no longer should be in the light.
Outside of that, it's a pretty simple set up, and keeps everything at the perfect temps. I have my temp controller set at 78° with a 2° delta. When temps drop to 76, fan and heater kicks on. Reaches 78, it turns off.
Overall, bags are doing fantastic. I inoculated on 01.10.20, and all six bags are showing zero contamination, and are between 15-20% grown.