It's going to cost you around $1000 just to have the tartan designed and registered. Then there is the cost of the kilt, kilted skirts, plaids, etc, for something that most likely you would wear only a few times a year. If I were you I wold look for something already in existence, unless you have (1) quite a few people who are interested in sharing the expenses with you or (2) more money than you know what to do with.