Enfold, you can use the search field to type 'level stair', I can't remember which category it's supposed to be in. I think Cuddles sells some for 80g.
Enfold, you can only drop inside your house. If the house is in a city, you can ask the mayor to decorate it or the zone it's in.
If it's on the open world, all the decorated houses you see are houses in where there are quests, and the GM approving them decorated the house to show there is a quest inside.
gummyboy, when the craft screen opens, you need to click on the items on the left side of the screen to add them to the Crafting process on the right side. Is it still not working after you do that?
 "GeoSketch"){kind=icon}
 "Balloon in a Wasteland"){kind=icon}
 "Golemizer"){kind=icon}