Upgrading My Hedgie House

I still don't know too much about the earnings in Hedgie, but it's still a fun game. I now have 11.43 Curio and am mostly trying to upgrade my house. When your hedgie goes on journeys you get resources. With those resources you can upgrade things in your house and they give you a bit more energy every hours.

I upgraded 2 of these items and I still have 18 earth left. I have to get the other resources in order to keep upgrading the house. I will keep sending my hedgie on journeys and keep upgrading my house until I find out how much a Curio is worth.