good luck man. I've got about the same amount of free time as you (for the same reasons it seems). There is a high chance to burn out in that situation... but just keep at it and use every small success to keep the motivation going. I almost lost that motivation last week, but thankfully I've been starting to find my groove and its keeping me going strong.
nice adsense stat, might want to upscale it?
That's a great start. How many hours do you spend on your ventures everyday?