Edit: So far the one thing I'm having to get in large quantities is Ore for Iron Ingots. Which I don't know if there is an infinite node I can build for Pals to mine it themselves. Haven't looked. But just killing or capturing pals as I go has gotten me plenty of other rare material. Only the Iron is really bottlenecking me much at all.
You're about where I am progression wise. I assume you're starting to dip into the dungeons too? The weight limit spoils the fun a little, especially when your pals don't store their in-base harvesting and you pick up 500 rocks and can't move any more.
I've put points in to carry 650 for weight. It would be better if they made being overweight just walking slowly instead of dropping off quickly to the point that the player can't move. There is a Pal that can increase carry weight by 100 as a passive, though I don't use it. My points have been in HP, stamina, and carry weight at about a 1/1/1 ratio. Two points into increased work rate. Haven't increased attack at all yet.
I have done two dungeons which are about what I expected. They do give the ancient sparkplug parts or whatever they're called, and one more point to learn crafts. So definitely worth doing. I've gotten some rare Pals from there too. Still have yet to die but I'm not fighting anything above my level either.
I did the first tower boss and that was entertaining. My Pals did most of the work. Found vendors to spend gold at. Now I'm just roaming the lands looking for whatever I find. Still low level Pals mostly.