Dog sitter in the country side

Hello, My name is Brendan and I live in a nice little house in the country side. My back yard is about 10m x. 20m and is fully enclosed with a 5ft fence. I bring Bran for walks down my landlords 100 acre farm, twice a day for his walks. I also go to Mooghaun. Your dog will be kept on a lead at all times. Bran likes to do his own thing and I have a tracker on him. I'm self employed at the moment so I'm at jome a lot. I'm trying to get a Wedding Car Hire and a Sauna Hire Business up and running so I have a lot of spare time on my hands. I also have a Ford Ranger with an enclosed back for transporting dogs. My dog Bran loves to play and run around the garden with his friends when they call. They get on great. He gets on with most dogs of his size. Can be guilty of small dog syndrome when meeting a large male dog. So I prefer not to sit large male dogs. Only medium and small. But I would mind large female dogs as he is in his element there.