[Suggestion] Change Hammers
Have separate hammer types. Wood, stone, cement, aluminum etc. You have to craft the hammers at stations that correspond with their type. So a stone hammer at the masonry bench or aluminum hammer at machining bench. For repair purposes, all hammers would work exactly as they do now and be able to repair any material. The change would be that if you have the correct mats you can upgrade your house with the corresponding hammer type. So If you have stone, leather, nails in your inventory and right click on part of your house with a stone hammer, it upgrades it to stone. The idea being that you don't have to craft 11 stone pillars to replace 11 wood pillars. You just have a bunch of stone/leather/nails and go around right clicking them. Removing the need to count or remember how many pieces you have of something. You can still craft house pieces if you want, but don't have to in order to upgrade.