I don't go out for just an eyebrow wax as I have a minimum charge which is more than that. I do eyebrow waxing with tinting or more waxing or a facial, or even with a manicure and it depends on the client as to what equipment I use. I have a folding reclining chair which is easier to carry than my massage couch, but it is another thing to carry in the car! I do as others have said in some cases, especially if I know the client and use their sofa with a towel under their head if it is just waxing eyebrows with a treatment that doesn't require the massage bed. No hard and fast rules, just adapt to the circumstances x