Not really, think of the planet as an Aldrin cycler. If you rendezvous with the planet, you only have to accelerate ships packed tight with people and some resources. Say, travel time to the planet at its closest approach is two years, but your actual destination is ten thousand years away. Then you only need to send up enough mass to support your initial group of people for two years, instead of all resources for the full population for 10k years.

Say such a planet where to pass through the solar system at some point. You could say, say, 50 Starships with people, tools, etc, which is within our capabilities. Then those people set up base on the planet. The planet provides everything required for the multi-generational trip.

Instead, putting up a generation ship of such size and meant to last that long, is well outside of our capabilities.