The business plan is really different depending on your starting capital.

If you have none, don't bother you can't afford the wood.

If you have a little, maybe your approach above is what makes sense.

If you have a lot, you might start looking at ways to lock down the chair distribution market within a region by maybe buying up some of the major warehousers - a bit of the old vertical integration. Maybe use some "free speech" of the financial kind directed towards some politicians to mandate that all workplaces have a certain minimum ratio of chairs to people.

The pricing strategy will be different for each approach.