P.W.
I have a couple of other suggestions if the cost is climbing higher than you had planned.
You can rent a room out at a local rec center that would be affordable. Then recruit your friends to help you cook and decorate. Or ask a friend to host at their house and make it coffee and dessert only. That can be very nice. You could take your husband out to dinner with friends to celebrate, then go back to their house....... surprise!