After each new town my chest resets to 0/6, is that right? i thought it is supposed to keep your progress heading into the next town. The only way to get the druid temple kit is to open all 6 boxes which takes way too many pots of gold.
What you retain from town to town is the task progress from the previous town. You are correct, the chests you can open in between towns resets in between each town.
One of the ways to obtain a full Druid Temple for free is to complete 4 towns opening all the chests in between town, receiving the final upgrade in a partially completed 5th town. That is the method I'm following.
I would say if you feel that method takes too many Pots of Gold, which mathematically it does not, it means you're moving to the next town too quickly. That's a bit where I'm at right now.
I ended town #2 with 2 tasks left uncompleted. I had enough gold pots to open all the chests moving to the next town with enough left over to buy my first few managers. In hindsight, I should have spent the extra day or two to complete those last two tasks, not that I'll need them for the upgrade, it would have been nice to have the extra gold pots from the delay going into the 3rd town.
In the 3rd town, not having accumulated those two extra days of gold pots, I've gotten stopped up twice waiting for more gold pots to complete the manager tasks. If I was going to get stopped up anyway, I should have just stayed in the last town to complete those last tasks.
Now I'm stopped up again, all the task in the 3rd town completed, only 1650 gold pots. I'm sitting with a town with nothing left to do until at least the next daily quest before I have just enough Pots of Gold to move on, to then deliver me to a town I can't start for another day until I have enough gold pots to hire some managers.
If I was going to be forced to sit around for two days waiting for enough pots to move on, I should have stayed the 2 extra days in the last town. Oh well. Hindsight. Not that it matters from a final prize standpoint, but it would have made for better gameplay. I'll try to remember for next year. Might as well finish each task, you got to wait for the gold pots anyway.
If you've not yet missed any chests, just sit tight until you've got enough to move on. If you've already missed opening chests, I've no advice. Others following a different method may have some. Either way, patience is the key.