Chopin in Valldemossa

My partner and I will board the Norwegian Epic sailing from Barcelona on 17 September 2017. I'm writing about an excursion idea for the afternoon of the 23rd from Palma de Majorca. I like Chopin and want to see the old monastery in Valldemosa where he spent some dreary months writing some glorious music. Viator will offer a 5.5 hr. private tour called "Valldemossa dn Palma de Mallorca" for 1 - 9 adults. One person pays $522, but nine would only pay about $72 each (with other prices for other group sizes). We need to find some others who'd like to see the beautiful old town and monastery with us -- interest in Chopin is entirely optional. Anyone like the idea?