20% is a lot. I would like to get a style analysis done and get recommendations on the type of stuff that I eventually buy, but, will definitely not pay 20%. Probably, I can consider paying 8-10% but that looks high.

Any basic furniture or style shopping would be about 50,000 CHF for an average person; am not getting into the league of ultra-rich 500,000 CHF expenditure on furniture. 8-10% on this amount is reasonable!