He could maybe raise money by doing a fundraiser and then when he reaches his goal he could donate it
Wll first of all start a little hard to see how much would be the most your friend can do and then go slowly so that the muscle gets used to fast movement but especially with a correct diet that must follow step by step.
I hope this works for you
Game such as frogs are useful for prey. The bigger animals such as let's say foxes will at them- and so the food chain goes on.