Hobbies that take time and money? Quite a few things. Yard work equipment. Just today I had to bring the clutch for our wood chipper to a repair shop ... if you forget to adjust the clutch on a 200HP diesel engine, and cook it, repairs are not fun and expensive. The chipper itself can eat 18" (45cm) diameter trees, and is self-propelled on tracks (so it can go off road). A very big machine, and an expensive one. It is then partnered with a crane that is also a bucket truck, so if a tree falls down in the forest, I can pick it up (as long as it is less than 26,000 lbs heavy). Or I can sit in the bucket and work on trees at 45 feet (15m) height. Which is quite uncomfortable.
The other one is the music hobby. The next two weeks I'm playing in a semi-pro Nutcracker ballet, and interestingly, this time I don't have to contribute any of the instrument myself (I play percussion, and another musician is bringing theirs). But the previous concert, I had a station wagon of stuff that I brought from home to play on. Some of it is very big (the 4-octave vibraphone is over 2m wide), some of it is annoyingly expensive but sounds fabulous. A few months ago we played "Symphonie Fantastique" by Berlioz, which has a great big snare drum solo when the main character is beheaded (no, not a joke). For that solo, I spent a big chunk of money on a special snare. Great investment, everyone loved the sound: Pearl Philharmonic 15x8.