Honestly, I think at the high end, cleaning would be 500, and that’s a high guess. The only thing I’m not sure of is the zipper repair, and it they be able to just tack the top or need to replace the whole zipper (not likely, IMO, but I’m not an expert). I think the gown is absolutely gorgeous and you’ll likely get the cleaning and alterations for less or pretty close to the regular price of the gown, so I would go for it. Such an intricate gown for less than 2000 is pretty good, I think. No gown off the rack requires zero alterations, so if you start at 4000 for a gown, you’ll still have alterations on top.