Lumber is usually less expensive by: Editor - Rich Bergman
Lumber is usually less expensive than paving stones. However there are some new products on the market that allow you to place paver stones onto a frame of lumber joists.
I have never used the product but have seen some of these systems at various industry trades shows and depending on the look of your home seem to be a nice option.
But you have to buy the special web framing system that goes on top of your deck framing. Then you have to get the right pave stones. So this usually adds up to more than just using lumber.
I won an inflatable 6 person inter hot tub. I have a large deck. 12x 20 on both sides of the house. With a header to the house and the deck was built 6
I'm putting a swim spa into an inground concrete bunker and will build a deck around it. I have been advised to keep the deck joists a minimum of 6 inches