I have been sitting on a mini-mountain of TCash for a couple of years now. I would use a little bit here and there when frustrated, but it was a real pleasure to use some to complete this very fun event. A tip - the shortest route is almost always the best and fastest route.
Also, a glitch I noticed before this event began - the background music completely disappears, especially if you go to the event center and then re-enter your town. Animal and bird sounds continue, but the happy music goes away. I think the beta testers are not as on the ball for developers as they used to be?
A big disappointment is that Santa makes such a prominent appearance in this event and then is gone. Once again an empty sleigh. Sigh.