I'm new to this discussion, but my mind must just see things differently. Phillip you did the right thing starting this thread as love can blind you. Having others see your situation from the outside with clear vision is most valuable.
If my lady told me that she was walking if I didn't come up the the money she wanted for the wedding I would pull back big time. You talk highly of the her brother bailing you two out of this situation, but will he always have to do this? My feeling, and I'm going to tell you straight the way I see it is that this is what you might be getting all the time. Do you want to live like that? Correct me if I'm wrong but when she is living with you your marriage is under the jurisdiction of the British goverment province/state/ burrough. God forbid if she divorces you in your country can she rake you over the coals for your assets? Something to think about.
I did buy a company laptop for my ex as she was working for my company after we got together. Long story short I had to bug the h*** out of her for that laptop back. She got many nice things from me that collectively cost a lot of money by American standards. I took care of her, but I was going to fight for that d*** laptop. It was company property and I fought like a Chinese person would fight for a lower price. I eventually out willed her, and she relented and sent it back. She wanted to keep that thing, and thought if she kept making excuses I would just give up, but that was my way of saving my own face lol.