The rescue station

Venus - central location - supplies the primary rescue team for the solar-system. The Royal Navy, if you like. As to where that Navy's based:

Earth and Mars each will have a fleet to patrol environs but as far as sending a "torch ship" to rendezvous with an errant liner like the Aniara, only Venus can count on being the closest at worst position. Okay okay: Mercury's a bit better but that's uncomfortably far in Sol's well - and its radiation. Venus' own Hilda might be a compromise; it can be supplied more easily from the planet and her Lagranges.

The issue with a Torch Ship is like what we saw in Event Horizon - high acceleration, so high gravity. This blog is in the habit of measuring that in meters-per-second-squared and calling that lower-case "g". Earth is 9.8 (I live in Colorado so, I never mind that "9.80665" autismo); Venus (cloud-deck), 8.7. Too high g and a man gets "G-LoC", loss-of-consciousness. There was a movie about that. Not as good a movie as Aniara.

That's a point in Venus' favour, that its d00dz are accustomed to high(ish) acceleration. It's just that Earthers are better. Even we're not as good as we need.

Since the nozzle would be pointed at the Sun, pushing outbound: here is the best, if not only, site in the inner Solar System to test and use Bob Zubrin's saltwater nuke. Or to collect antihydrogen for microfission thereby the Fusion Orion.

I suggest that Venus have a space-station and/or space-station levels to acclimatise people to higher g. As in: from birth. These people will be born and bred short and (very) stout, to staff Torch Ships. That's home base. The rescue station, which these people staff in shifts, is the higher-radiation Hilda. Parked at the stone Rama version of O'Neill, I assume.