I left my first fiance because he simply wouldn't walk down the aisle - everything else really was great, but it was a deal breaker to me. He said he didn't see the importance. My argument was, well if you don't see the importance, it won't bother you to do it will it when you see how important it is to me! In other words, it was more about his lack of respect for me if that makes sense. (as in, he wasn't bothered I was upset, he still wasn't going to change his mind)
My friend has just walked down the aisle with her man who was adamant (after 15 odd years and 3 kids) that he would never marry her. SOMEHOW she managed to wear him down. And I mean, wear him down. She had the wedding booked within 2 mins of him proposing (hardly proposing, just said, fine we'll do it then) and wed him within 2 months.
I went to the wedding. It was the most unromantic thing I have ever been to.
Surely if someone doesn't want to marry you that should ring alarm bells?
Forcing someone to do something they really don't want to do (for whatever reason) is never going to end well.
Money is bullshit. It's what, £400 for a church service? Dress off ebay for £150. A wedding doesn't have to be a huge affair. Ours is costing hardly anything. First fiance used that excuse too. Ten years on, I can see that he just didn't want to marry me, and the day when we would have enough money would never come!
You need to have an honest chat with him, and make sure he knows how much you really want to be married to him.
Only then can you decide if it's a dealbreaker if he still says no.
I'm sorry if I'm being direct, but it took me 5 years to walk away, and with hindsight, I should have listened to the warning signs. Of course, never an issue if actually being married isn't something you want either!