A lot of people are suggesting the consulting route and that is fine. I suggest taking a job that is simple and monotonous which does not require much thinking at all on the job. Mental downtime at work = paid time to plan out your business. Assembly line work, event staff, security guard, truck driving, etc can all work for this strategy. I wrote an internet security patent while working on an assembly line. Assembly line work is boring and thoughtless. Perfect for thinking about something else while on the job. I had a lot of time to think about the patent all day. Then I would come home and write down stuff that I thought about all day and added it to the patent. In this way I was "paid" to write a complicated patent which would have taken the same amount of thought and time if I wrote the patent on my couch at home getting paid nothing. A solid business needs thoughtful planning anyways so why not get paid for it?