Consulting. I used to consult for a travel based startups couple of years ago, and trust me, the pay is too good to neglect. I get paid months salary of my daily job as week's pay once I proved myself. It is bit of a gamble and you need to showcase your abilities, have good contacts etc, but it's worth. I earn half year salary i just 2 months.
But being a consultant while you have day job is simply daunting. They suck the living soul out of you. I worked close to 20 hours, hardly got any sleep for first few weeks. Once your team at client place is ready, this will be less. But be prepared to get bombarded by lot of questions asked by the developers and their managers.
It was exhausting, and too much for me. Especially when you have deadlines to meet for your own. So I had to quit it just after 6 months of consulting. But man, the pay was seriously good.