If you're serious, I would guess the first step to accomplish your goal would be to DESIGN the furniture.
In all seriousness, though, materials are not cheap; and, many furniture businesses who do what you're describing already exist. So,if you're serious, it wouldn't be easy for you to jump in and actually hope to turn a profit, or even get a single person to buy what you're offering.
I'm sure this is a troll thread, but still, there's my answer.