I'm liking this topic! I rescued a fish (Asian Upside Down Catfish) and he came in a pitiful 5 gallon tank--no heater, awful filter etc. Let's see, I bought a new filter, heater, food, light, water conditioner, tank cleaning supplies to get him comfortable in his five gallon. Then I bought:
75 gallon aquarium, substrate, heaters, thermometer, water testing kit, numerous plants and decor, lighting system, hood, tubing and air hoses, fluval cannister filter, python cleaning system, nets, aquarium stand, and I'm sure there are a few other things I have forgotten.
Haven't added it all up yet.....so much for the "free" fish. I also rarely see him--he's nocturnal.
Oh--and I still need to buy tankmates at some point.😁