You've got to slap that businessman into subjection! Talk to your wife about safety, traveling convenience and comfort, and take her places that she wants to go. Then you can go some places that you want to go. See @Marauder's experience for getting your wife to suggest upgrades! Please ignore the actual numbers, just make sure you can foot the bills when they come due. My wife knows what I paid for the plane, and what one [pricey] annual cost [sort of cost, there were some unexpected failures that year].
All I really track are operating expenses--insurance, GPS databases, fuel and oil [which I change myself, what I call "the costs to fly]". Everything else is the cost to be able to fly. Only ever discuss the former set of numbers with your wife . . . . and try hard to forget the second set yourself.
Have fun, and make your plane whatever you want it to be. How much payback did you get on your motorcycle for those extra-large saddlebags, or chromed crash bars / master cylinder cover anyway?