I had some leftover 1.5 inch hardwood laminate butcher block countertop.
I had one big piece that could fit a 20" diameter circle to be cut out of it.
I had another piece that a 13" diameter could come out of it.
I ordered a "Lazy Susan Bearing 18 Inch - Heavy Duty Lazy Susan Base & Hardware, Silent Turntable for Smooth Rotation (Aluminum Alloy, 380LB Capacity, Base Only)" for ~$60. I could have gotten the same size, but cheaper hardware for ~$40 that supports up to 265lbs aka the "Heavy Duty" model instead of "Commerical".
Well, with my dad's help we got it built!