there are a lot of factors and variables that change in the process the landlord with the build out can even change this drastically the build out will usually cost a regular fitness center at $ 20 white box sq ft to $ 30 a square pretty nice build out crossfit would be cheaper or even cheaper to find a space that has already been built out somewhat monthly expenses equipment leases down payments are usually 10 to 20 % total cost for start ups
According to the table above, one cubic yard of concrete placed at a thickness of 5-inches covers 65 square feet. In a perfect universe, our 1,080 square foot driveway will need exactly 16.62 cubic yards of concrete (1,080 square feet / 65 square feet equals 16.62 cubic yards).
For your 20x10 patio, at about 4 inches thickness. That's 200 sq ft. Multiply by .333 ft = 66.66 ft cubed. Divide by 27 (sq yard) = about 2.5 yards of concrete. Calculate $85 - $110 per yard, depending. Since you'll pay a premium for a short load, I'd say total will run about $350 - $400.