I just looked it up, and moving a lab costs three seasons, vs. two for setting it up--but in this case, since we're not moving it very far, and therefore it doesn't have to be crated up, we can treat it as just setting a lab up.
At any rate, I need to go back and figure out if he set it up in the first place, not because we want to keep it, but to calculate the expenses for the year(s) in question.
Scott
EDIT: Here's the last version of Patrick's seasonal activities plan: https://forum.atlas-games.com/t/seasonal-activities-and-advancement/6214/16. It looks like he set aside one season to create longevity ritual, but no time actually to set up a lab. Since he apparently needed the longevity ritual by the end of the year, I'm going to say he did actually set up the lab, and used it for one season, and I'll adjust the expenses thusly.