I want a greenhouse!
I do save bubble wrap, and I should use it on the trays I put on my one heat mat. I don't have enough humidity domes, but I have plenty of 18" wide Saran Wrap, and min i-blind slats cut narrow enough to fit even in the little cells in a 128-cell plug tray.
Never do it the easy way if there is a cheaper "MY way"!
I worry that I don't have a soil thermometer ...
BTW, my bubble wrap is mostly anti-static bubble wrap. I have no fear of electrostatic damage to my seedlings!