Incubus do you have 250 people you expect to invite or 250 people you expect to attend?
If you invite 250 you’ll get 200 at the absolute max, possibly as few as 175 if many guests have to travel. I’m pretty sure I invited around 125 for 80, and it would have been 75 except I invited a couple law school friends about 4 days before the wedding when it became apparent there would be room.