I’d second this. Buy a switch tester, and have a play to see what you like. Some computer shops even have them in store to ‘try before you buy’. Next thing is the keyboard typo. Ortho? Split? 100% or 40%? FWIW I started out with an ErgoDox, and then played with layers and key layouts until I found something I was happy with. Then you can simply stay there, or if you’ve reduced your keys to something like 36-keys, there are a wide range of boards to choose from with slightly varying layouts and designs.
Depends on the definition of cheap, but you can find stuff on thingiverse and get it printed/print yourself if you have the hardware. Otherwise a tripod for each side seems to be fairly popular, either with gorilla grips or simply legs you sit on the desk.