Let’s start from most important point as the price of training, all kitesurf schools in Lagos are approximately same (plus, minus)

What determines price of a lesson ?!

Cost and quality of equipment (Kite, board, harness, wetsuit) and if it’s included in price of a lesson.
Professionalism and certification of instructors (IKO, VDWS)
Duration and type of lesson (group or individual)
Additional services such as transfer from Lagos to kitesurf spot and back, insurance, rescue boat.
Each company has its own trick, basically this is cheaper lesson less useful time you spend in the water practicing.