This is more of a suggestion after you can buy the hill house, but it would be nice to choice, to an extent, where things like shelfs, crafting table, the little cubby things, fire wood rack, etc can go and add more if needed. You would proabably have it so you choice what goes where and pay a fee for it to get move, add or removed.
Related suggestion is to have upgraded versions of the forge and smelter, for the foage upgades: bigger and hotter (heats up metal faster) and for the smelter: faster smelting and less fuel use.
Another related suggestion, (related to shelfs) boxes that can hold stacked of items with a area at them bottom to take them out for easy storge and access so you could put something like pickaxe heads in and get them easily from the bottom, also have it so you can use them next to the smelter for coal.
It would be nice to be able to order lanterns and lid boxes.
Last but big thing, bigger size lid boxes.
Thanks for all that you've done so far and going to do. It's a really fun game and has a lot of potential!