I think a good way to do this would be to have a home vs gym workout question on the workout questionnaire then have each exercise have an availability section on the edit exercise page which has a check box for home and a check box for gym. This way people without home gyms can just have bodyweight exercises for workouts where they can’t go to the gym and those with limited gym equipment at home don’t have to swap exercises depending on where they are going. And people that go to two different gyms with different equipment can treat one as “home” and one as “gym”