How much do dog walker earn in scotland?

i thinking to setup a business of dog walker but i worry about losting my job seeker if i not earn enough coming in the house or not getting enough dog, i understand the business side i read that up but it the earn i worrying about my wife not working too, she on other benifits. that cant work for reason. is there anyone out there do a good earning on dog walker if i want to go ahead and i also thinking dog grooming too but it too dear for course and job centre not help me with that.

thank