Bad news Liverlips, as someone else has said, meat is meat, so is chicken and salmon. Vegetarians eat dishes made from vegetables, pasta, nut roast, etc. I agree not spending a huge amount of money makes a lot of sense.My daughter is vegetarian, the first thing she asks when invited to a wedding is what time is the dinner. She knows all she will be able to eat is what ever vegetable is served up with the main course. If roast potatoes are on the menu they are out because they will have been cooked in the fat of the meat. So, she has to take sandwiches to fill up before the dinner. A wedding is usually a long day and by the time the reception comes round everyone is starving, including the vegetarian. But usually they are not catered for and are left hungry unless they bring their own food. It's not very polite to go digging on the plate either to see if there is gravy ( made from the juices of the meat ) you see the problem.
I've never heard of a hotel that didn't offer a vegetarian option at a wedding. Most hotels don't include it on the menu but will have asked the bride and groom for a rough idea of how many vegetarian guests to expect. Tell your daughter to tell the waiting staff at the next wedding that she's vegetarian and she should get a suitable dish. Each table at our wedding was asked if there were any vegetarians and they were catered for ...afaik it was a vegetable pasta bake. The hotel usually offer the vegetarian dish to any guests who don't eat the main course...we had beef.