I started in havc when I was 21, at 30 started my own hvac company and at 45 sold that company and was able to retire. There is money to be made in hvac. If I have any advice for you it is, take in as much education, regarding this industry, as possible throughout your carrier. This should include, trade schools, hvac specific seminars and trade shows. Remember, there are people out there that know way more then we do, find them, hang with them and learn. Stay on the cutting edge of the industry, it will pay off.