This is a huge order. What type of a kilt are you looking for? Traditional-tartan or contemporary? How much do you want to spend - $50 - $500 - $1000? Are you looking toward getting an entire outfit? Getting a kilt is like getting into quick-sand. I started out with one and suddently I have 7. There is always one more thing to buy.
A few answers: A good wool kilt can last for many, many years. Kilt material weight - I live in central Texas and it is HOT here. Our winters are like Scottish summers. I look for light weight wool I can wear (others will criticize me for not having the proper "swoosh") but I am into comfort. Where to shop? You will be swamped with responses from member on this site. Have fun with your new venture.