bdjuf,
i think we all feel like that at times.........myself included. i'll break it down for you the way i see this........
go where the money is........if you can make a great living in this business, i say do so and reprioritize everything else as money means security and freedom to do what you want.......
along with focusing on this biz, you need to rest! sleep is probably the most underrated activity to maintain yourself, along with decent eating habits and some exercise.
you are burning out, my friend. make sleep a real priority, and even naps, man, who out there doesn't like a great 15 minute nap? can completely recharge one's batteries......
so focus on the money, and when you work, work hard, and then rest
take care my friend