Hi Al - Plywood CNC's are very doable. Here's a link to a German company that does it commercially. N34 motors are overkill. N23 or N24 will do your job easily and save $$$ on electronics and power supplies etc. I wouldn't go hybrid servos I would go the extra mile and go servos if that's within reach. The hybrids don't offer enough for the cost delta to a std stepper IMO. Better to use the $$$ somewhere else on the machine. Just coat the plywood with good resin to seal out moisture and you may never build that aluminium machine....
https://www.cnc-holzfraese.de/