Wanting to get married before baby comes

My fiancé and I have been together for two years and engaged for one. We’re having a little boy this September and I want to get married before then so we all share the same last name, but it’s hard because of insurance for all three of us is so expensive at his workplace! It’s the absolute best apparently but since there’s so few workers it’s more expensive for everyone. We’ve been looking around for other insurance but it’s all looking the same. I’m thinking that we just get married and find the best for us. Prayers everything works out for us!