I would reach out to water tank liner experts and see what you have to calculate, because you probably want to ask people with experience that have done this before. Try carson liners: https://carsonliners.com/
Personally, I don't think there's a difference when it comes to getting a high-paying job. Maybe with a "non" prestigious degree you won't get a job at a highly-coveted company, but you can still land a very high-paying position. As long as your degree says "engineering" in anything, you are...