Gotcha, sounds about right.It was a nightmare on Roll20 (because it didn't have access to the NPC and monster stat blocks) - if you recall I put Abomination Vaults on there, and probably put in 80ish hours to get the first two books put in.
On Foundry, it wouldn't be as bad, because at least you have access to the monster stats from the compendia. I do think it's more time intensive to create tokens and maps on Foundry than Roll20, but at least you've got stat blocks.
But if it came down to that point, I would just write my own adventures.
Pathfinder is a different beast from Traveller. You have a lot more combat, with more detailed stat blocks, unique magic items that have to be entered, etc.
How available and whats the timing like for the old free modules? I would guess folks might like this announcement because timing might be better even though it now has a cost.