I commend you commitment to your health sir!

I think a test kilt to ensure you will enjoy the experience is a great idea. Many folks report liking SWK kilts, while others avoid acrylic kilts due to their being flammable, and their tendency to pill over time. A better alternative may be a low cost Poly Viscose kilt that you will be able to keep, after you traditional kilt, for rugged and casual activities. There are a number of 8 yard import versions for around $80 delivered. The imports tend to use eastern PV, which is a bit coarser and heavier than the PV from Great Britain. The benefit is that because the material is heavier, and they are typically made with more yardage, they tend to better approximate a wool kilt experience than the low yardage casual kilts. I have one from these folks in the Scottish National tartan that has served me quite well for casual outdoor activities.

http://buyakilt.com/kilts/budget-kilts

Keep up the good work!