Unless there is a recognised trade incorporation such as plumbers, bakers or joiners where the title "Master" is obtained by serving an apprenticeship and also nowadays combined with some college training, anyone can give themselves that title. This particular gentleman seems to be an Irishman who has started started up a kilt-making business after leaving the army. His prices are certainly pretty eye-watering. I would suggest that anyone seeking a kilt here goes by the recommendations of existing members who can vouch for a kiltmaker from personal experience and reputation.