OK, I read the part about you not having easy, consistent, access to a swimming pool.
Do you have access to a bicycle, or a stationary cycle? If you have a regular bike, there are kits that will convert your bicycle into a stationary bike by slightly lifting the back wheel. Then you could pedal a bike without the full weight of your body on your foot.
I do agree with others who have written that examining your food intake will make a huge impact on your weight loss.