Todd, Just ask her if she would rather you take up fishing as a hobby?
If she thinks trains are expensive, fishing is much more costlier. If she says yes on the fishing, Then just start down the road of costs… The Boat ( fiberglass hole in the water you throw money into.) oh yah then there is the yearly license cost, and the yearly insurance cost on the boat, and fuel, and oil, and etc. maint. You need a trailer to haul it on, and the yearly license cost, and the yearly insurance cost on the trailer. And a Pick Up truck to haul it around with, and the yearly license cost, and the yearly insurance cost on the truck, and the fuel, and oil, and maint. Now add on all the Coast Guards required safety stuff, life vests, radios, horn, and etc. Now about time to go fishing, priced rod and reels lately? Lures, baits, Ice chests, nets, etc. And you need a trolling motor, and two special (expensive) batteries for it, and a charger for them. That fish finder is a must if you are to catch any thing at all. A marine GPS so you can find your way back to the dock so you can pay your dock fee. And the latest Software download ($$) to keep it current so you don’t wreck the boat on some unknown rocks.
At the end of the tail of fishing, she will just tell you to go run your trains.