I know you don't want this to be an incubating thread but that is all part of preserving the breed. Some of my hatcher/brooders are Omaha Steak shipping boxes and many many years ago before I bought my cabinet incubators, I used the styrofoam incubators. I still marked the eggs.Some folks have already messaged me about a hatcher. They say they have an incubator, but need a hatcher but don't want to spend a lot of money.
Cmom has built most of hers. I have built a dozen incubators and hatchers or more and hatched hundreds of chicks out them..
I don't wish to have this thread on Reds get side tracked into a hatcher incubator thread. Goodness knows, there's enough of those here on BYC already, so I suggest you search up those many, many threads. Caution. Lots of threads on building them are quite amateurish and they won't work. These eggs are too valuable.
My suggestion is to get up cmom privately, via pm. She can show you many, many photos of her home made equipment. This does NOT have to cost an arm and a leg. All mine are simple Omaha Steak shipping boxes they mail out frozen meat in. Nothing special and they work like a charm.
Get up @cmom for further guidance.
One modification I made to mine was to put a milk bottle cap on the adjustment knob which gives better control as the knob is so sensitive when it's turned.