@Debbie297
I have a sleep number for myself, and I actually liked it so much I purchased one for my parents last Christmas. However, given the price, unless I was running a luxury listing, something higher end, or something at a higher price point I think a 2k+ mattress is a bit excessive and likely wouldn't even be noticed or appreciated by most guest. Additionally, while all Airbnb's have wear and tear, private room rentals tend have a higher turnover rate, as they are more moderately priced.
I purchased more modest options at around $300 and added a nice mattress topper and protector. I get quite a few guest that comment they are very comfortable.