not much time,about 30-40 minutes for an simple item,however i will try to spent about 3 hours on an item,if it get well done i will use for item forger application
about the video,like the pc was bad,only on render i needed 2hours(yes,TWO FUCKING HOURS FOR 8 SECONDS),the model and other stuff wasnt really long,its simple as well,my new pc can render 8 seconds video in about 5-6 minutes(it render frame-by-frame,as well to apply the other effects you putted)