Each 20x20 tent can seat about 30-40 people at tables, so a 20x40 will seat 60-80, a 20x60 will seat 90-120, etc....
The 1st row of tents is priced based on large 4ft long stakes being used to anchor the tent down.
The 2nd row of tents, where it says "w/Water Weights" are where the stakes can not be used and we need to use large water barrels. Usually this is the case when setting up on concrete, asphalt or on ground where underground wiring or pipes may be hit. The use of water weights does cost extra and requires that we be with 300ft of a water source to fill them.