Woods of varying softness & grades such as Baltic plywood allow for firmness & flexibility. Easy to stain or paint. Great for homes.
Strong but flexible plastics such as HDPE can service mass market retail, schools & hospitals. Also great for nurseries & dorms.
Bamboo can behave like a hard wood with strength, firmness & beauty. Great for offices.
CNC machining requires both software and mechanical engineering. Production volume & costs can vary but many domestics options are available. Works well with most types of wood and on certain plastics.
Injections molding requires industrial machining and molding, usually in Asia. It can provide high volume & low cost plastics production.
Industrial grade 3D printing works for plastics at a smaller scale and with denser filaments such as ABS. It is relatively low volume, high cost & less durable.