As other have said...it's something between you and hubby. Have you discussed the pros and cons of a class C? Are you going to go out only with the class C or are you going to have to deal with towing a car for getting around? Is storage a problem? Will it be a 2nd or 3rd motor vehicle to register and insure?
I know I can be a little quick to "pull the plug" when I get interested in buying something new and the best thing my DW can do is just generate some good conversation without being excited or emotional (you know males can't handle that!). And, it's got a lot to do about how you and DH have handled finances in the past. If you have genuine reason for concern, than say so, but leave options opens such as let's hold off a year and then see if we have more $ to put down, etc.
I hope everything goes well!