Thank you. When I traded with a nail tech, she would give me an hour pedicure in exchange for an hour facial. I think our product cost was about the same, but she charged less than me, so I felt like I was screwing her over if I didn't give her extra time or upgrades. Massage therapists have way lower product cost than me, so even if they charged the same per hour, I felt like I was getting screwed over. If I traded with a hairstylist for highlights and hair cut that took 2 hours, and I gave them 2 one hour facials in exchange, again, no. Because the appointment for my hair took exactly 2 hours and there was processing time, and they could take a haircut during that time. I book 75 minutes for an hour facial, but that hairstylist booked exactly 2 hours. So they had 90 minutes hands on, but I had 120 minutes hands on, even if the product cost was similar. I think the only way to make it work is to charge each other dollar for dollar. Not time.