Your Fiance is planning his future as if there’s a strong chance your marriage won’t last. And in that event, he would be protected, and you would not be. He would own the house, you wouldn’t. He makes more than you, and has for a while, so he’ll have savings, you will have much less. I imagine the next step is that he will want a prenup.
Think about the words you’ve used to describe your Fiance and your relationship.
You’ll pay rent to him to live in HIS home.
Your finances will be COMPLETELY SEPARATE, even though you never discussed or agreed to this when you got engaged.
Your Fiance DOES NOT CARE about the basic desires you have for a house you’ll live in together, such as safety and a good education for possible future kids.
Instead, he’s prioritizing a shed and space for himself and friends, that you will not be ALLOWED to enter.
He’s insisting you pay for all wedding expenses he designates as yours, clearly not seeing that a marriage is a joining, and he’s a part of the wedding too, so should contribute to the wedding as a whole.
He also is either ignorant or dense and unwilling to hear you when you explain what things cost. Unless you have something extremely small, $800 is not going to cover it. If you want a small wedding, that’s fine, but you should split the cost of it down the middle.
Read your post. You’re engaged to be married to a man who will want everything of value separated into his and hers, with him having the upper hand. He doesn’t care about your wants or the safety and education of future children. He believes he can dictate what you are allowed and not allowed to do or whether you’re allowed to go into a place he considers his. You say yourself that he’s acting like you’ll be divorced before you’re even married, meaning your chances of success in this marriage are negligible.
Finally, you seem to be excusing all of this disgusting behavior by way of his parent’s sudden divorce. All this does is highlight how immature your Fiance is that he can’t separate your relationship form his parents and it shows he has a huge lack of trust in you.