Would be a ton of fun, but it isn't nearly as plausible in a MMORPG. Stuff like that id pretty stressful on tech. Its easy on a single player load but hard on a server load that could be doing hundreds to thousands at a time.
Afaik the building in Skyrim was not so much different than it is in ESO and it's very similar. Just the outside was a bit based on personal taste (a choice if a house has a rectangle annex or a tower for library). I'd say furnishing in ESO is way more advanced.
PC EU (PL): 14 characters. ESO player since 06.08.2015. Farkas finest quote: "Some people don't think I'm smart. Those people get my fist. But you, I like."