You live in the country and it is all hills, I don't understand that statement in relationship to , "no where to run" Run up and down the hills. Or walk up em.
Calorie control is going to be your first priority. Way easier to consume 100 calories than to burn them. Don't eat much chips ? Your going to have to change them to don't eat any, also no high calorie drinks. Sodas will kill you. Really stay away from empty calories. Eat things that are real food that have some filling value for those calories. The more processed it is the worse. If you look at it and can't tell what it came from don't eat it.
Exersise is about finding something streneous that you like. If you hate it you wont do it or will find excuses. You hate running so the hills are an excuse not to do it. Don't worry about it I hate running too. Find soemthing you do like that has a cardio aspect. Bike ride, play tennis, volley ball, basket ball. Find a community team and join. Chop firewood.
Always park in the farthest away parking spot, take the steps instead of elevator. Turn the computer off and go ride your horse. Get up and get active. Stop with the empty calories.