I have an idea, picked colours an also my gown, can cater it myself, An...

I have an idea, picked colours an also my gown, can cater it myself, An decorate it myself an make my own favours. Not getting married just for gifts an party ! But don’t wanna be bankrupt for one day. We’ve been together for 9yrs although we’ve known each other over 30, this will be the one an only time I do this as I’ve never wanted to get married an I’m 39yrs old.. ????