Make a bargain with the devil...or worse?

[CrankyOldMan]

So my wife has noticed the amount of time I spend visiting this and other yaris/performance sites, and asked me what my intentions were. She said that in light of other large hobby purchases that I have made in the past that didn't reach fruition, she's "concerned" about what I would be spending it on.

Over dinner, I explained that ever since I went to the local ARA track as a kid I secretly wanted to be a race car driver. That became more of an interest about 10 years ago when I stopped by a local SCCA autoX event. I totally get that I don't have the money or talent to be an actual race car driver, but I like to drive aggressively (or as aggressively as I can in my roller skate) and would love to bump up the performance and handling.

So here's where the meat meets the potatoes. She offered me a bargain. Yes, a bargain from your wife is probably less secure than one from old Scratch himself, but here's how it goes:

I can do whatever modifications I want, no questions asked, but she gets to pick out/design the paint scheme/graphics.

My first thought was that I would have to get a Hello Kitty exhaust kit to match the paint, but she swore it wouldn't be anything THAT bad.

So I put it to you, YW: am I being Fausted, or does this seem like a worthwhile bargain?