I agree with the above comments. You can't go into it thinking that you have to hide the expenses of your pcar habit. If you're that concerned about it that you posted the question, it sounds like you need to have a realistic and honest talk with the future Mrs.
You'll have to find a compromise on the house and car(s) but you should not have to give up or hide your enjoyment in the pcars. Before I got married, I was very clear that the car was my hobby and it was going to cost money.
When you have that talk, find out what her shoe, hand bag and clothes expenses are. If she's anything like my ex-wife, you're pcar expenses will not equal hers.
