Yeah, it's not horribly complex. You got a guy that knows how to weld, or you find a couple metal containers. Grab a old hot water tank from the dump or something. Could possibly use injectors off of some junkyard scrap to inject the MEA though the air to soak up C02. The boiler part, you need a container that can take a fair fit of pressure and heat, a burner under it, so maybe like off of an old BBQ or something. No idea how a person would get any MEA, a chemist might know how to create it with common household items. Probably need a couple compressors, some kind of tank for storing C02. Old propane tank could possibly work. Not sure how they get the depleted MEA back over to "tank 1", they gotta get like an equilibrium going looks like.
RE: Mono-Ethanol-Amine