I think I would end up somewhere between 350 and 550. I would also gain a LOT faster if money wasn't an issue. Clothes are just too expensive if you need new ones every few months.
with that kind of cash to draw on...suffice to say I'd get fatter. I never focus on numbers myself, but I'd probably gain a lot.
As for my significant other, I wouldn't mind if she gained weight as well. But I'd have to stay much larger than her, and would prefer her to stay slim (every time I say that I hate myself a little...because double standards...but there it is.)