Since he’s open to nude and sensual, I’d suggest that he offer something unique that differentiates himself.
I think guys who deliver and market a new experience - Lingam massage, edging, milking in various positions, tantric, etc are always very intriguing to me and probably commands more money.
I also am a fan of a masseur who runs the show. If a customer asks for particulars simply say “I will take you through a memorable experience that you’ll never forget”. I love to have an unknown experience and don’t like it pre-scripted.
Also I love when a masseur starts out by using drapery. It adds to the mystique. Even blindfolds or other elements that may be u expected.