I too think it should be sort of a passion BUT I know a few guys that have businesses that do well and there is NO WAY they are passionate about roofing or landscaping or industrial automation. All have done VERY WELL. Industrial Automation guy has a $15M business. Landscaping guy has a $30M business and roofing guy probably a $5M business.

I have a young friend I mentored. He actually gave me a book about how you SHOULDNT be passionate about what you do in your business. for example a baker. If you grow to any scale you wont be mixing the batter anymore. You'll be doing hiring, payroll, taxes, purchasing. If you grow to the point where you have people doing that you'll be even more removed. My younger friend, now in his 40's has over 100 employees and just bought an 80,000ft 5 story office building and has 7 satellite offices in multiple countries so he has "some" idea.

I SAY DO IT. WISH I HAD SOONER.