Both my husband and I have been married before. We were married by an officiant and we had our ceremony/luncheon at a mansion. The only people that we invited were are parents, siblings and their children, and my daughter from my first marriage. The ceremony/luncheon was three hours long and it was beautiful. If I had to do it all over again though, I would have included distant family and friends because it caused alot of hurt feelings and some people have never spoken to us again. I think it's a great idea to have the ceremony at your house and have it catered. You may pay a little more in terms of food, but include everyone even if you think they won't come--believe me, people get ticked off if they don't get an invite. People enjoy weddings--especially weddings that are intimate like backyard weddings. Is it worth losing family and friends over? It doesn't matter if this is a second or tenth wedding for you..it's a special occasion. You can cut costs in so many ways--print your own invitations, have a friend bake your wedding cake, buy your dress at a resale shop, etc.
Just my experience and my 2 cents:)
Congratulations and best wishes:)
M.