I'm looking to create a starte4r player home with the idea that it starts out as an abandoned house, which you buy cheap in Riverwood.

Before purchase, it has cobwebs inside and on the outside. Once initially purchased, I would like the webs to disappear. Then through purchased upgrades the starter items would change to more upgraded furniture. But Im not sure how to first get rid of the cobwebs and replace them with ex. bedroll, a few sacks, a cooking pot etc. Then I would need to replace, say, the bedroll with an actual bed when said upgrade is purchased. How would I go about this process?