According to RCDB, my homepark is ... this place:
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It's a zoo with a zipline and an Alpine Coaster. So naturally, it needs to go the Kolmården route. Phone RMC, let them go nuts.
OK, realistically, they could - could - perhaps get a fourth-hand Go Gator, but it'd probably double their attraction maintenance budget and draw in zero new guests.
But hey, if they could have any coaster, but staying within the limits of the somewhat reasonable, I'd have them take Loopen off TusenFryd, which I guess is my "proper" home park. That way, TusenFryd will be down one coaster and thus needing to build another to fill the gap. Also, Loopen will be hundreds of kilometers away where it can't hurt anyone. Namsskogan Familiepark wouldn't even have to assemble the coaster, saving a ton of costs. Just leave the pieces to rust in the car park. Come to think of it, let them have Colossus too so Thorpe has to replace it. Again, no need to actually assemble it.
As for what coaster to build at TusenFryd ... it's a tough question. It pains me to say it, but the park needs so much else before it needs another coaster. I guess something nice and compact like one of the well-made Gerstlauer Infinitys or a spinning coaster could fit nicely in the spot left after we sent Loopen to the middle of nowhere. RMC-ing Thundercoaster could work as well, but over the years I've come to think Thundercoaster is somewhat detrimental to the park overall, as it forms a sort of barrier right in the middle of the park, necessitating very long walks around it. The paths that surround it also have a difficult terrain to work with, so there's no room for any attractions anywhere near it. Thundercoaster is nice enough to ride, but it's in the way of anything sensible ever being done with the park's awful layout.
If my new coaster for TusenFryd could be made as part of a whole new area, this problem could be solved. I think an S&S Free Spin or perhaps an Intamin Impulse coaster could work nicely for the purpose, as it would need to be space-efficient. It'd be located along the highway next to Super Splash, taking up next to no room. It would be the star attraction of a new area on the site of the upper car park, beneath Thundercoaster, joining the park entrance area to the Viking land at the bottom of the hill. The park entrance would be turned around 90 degrees, facing north instead of east. With some clever design, most of the car park could even be retained, just accessed from another road. The new area would be rather long and narrow, but it'd be the park's main street anyway. Those don't take up much room.
Or just rip out Thundercoaster and put a new terrain woodie in the hills above the park instead of right in the middle of it.