If it helps, I was shopping around for quotes for a 120 person wedding a few months ago. What I found is below. tldr: it's going to cost at least 30k

Venues within 30 min of Richmond that could accommodate 120 people (most were just venue fees although some of the more expensive ones included more) $3-$20k

Rentals (tables, chairs, basic linens and dishes) were $3-4k

30x60 tent (labor, permits etc included) $3.5-5k

Catering (chicken + beef with one veg, one starch, soft drinks, no apps or desert including labor) $6-15k - we didn't consider BBQ but that's the only cheaper alternative

Bar Service (BYOB just cost of servers, liquor license and the physical bars) $2.5k