If the coach is ACTUALLY good (2200+ rating and good at dealing with people), then it's between 8-30 euroes per hour (unless the coach is super strong player).
If the coach is just decent at chess, teaching basic strategies (1800-2050) then free-5 euroes per hour
Is offwring and providing chess lessons an easy and fun way to make money? How much are people willing to pay? How much is a good rate to charge people?