You can differentiate yourself — hydronics requires a knowledge of gas/electric heating and plumbing and pumps.
Hydronics contractors are considered the cream of the crop.
Offering hydronics sets you apart.
Matt Michel's tips to advoid stings:
Integrity is no protection.
Steps to protect yourself.
How to kill a stings.
If you’ve got great SEO and you find yourself at the top of the Google ten-box listing of local plumbers, life is good