Actually is a pretty CHEAP set-up.
The furniture is from Target. Their Mission series; very inexpensive, but very solid if put together well. The table that the board is on was made by me about 15 years ago from the remnants of a piece of 1" furniture grade birch plywood along with some screws, a couple of 2x4 scraps, and 4 casters off a discarded microwave cart. The chair is another inexpensive model from Target. PC was a mid-grade purchase from Best Buy.
You don;t have to spend a fortune. Just pick good solid equipment, and then take care of it :-)