Bootstrapping --length, effort

Startup gurus, I am one of those very resilient (call me obsessed and passionate (sometimes insane would also do)) first time startup fellow trying to make world more secure on cyber space. Situation: No external funding, 2 patents issued, one website launched, some letters of intents from some institutions, but no major progress as we are going thru a long sales cycle, core product finished but needs feature enhancements. Got a "psuedo certificate" from a big-player CTO that we are a disruptive solution, but might take longer to get traction as it involves user behavior change. Not much of marketing, as we should do. But due to severely capital-crunch we are slowly but steadily dragging on with whatever we could. Personally have been on without major pay for a few years, and now I am feeling the pinch of bootstrapping and planning to take up a full-time and continue to bootstrap, as we now have IP. We offered to license our tech, but a few major corporations are on the wait and watch list. So we had this website launched (out of frustration from conservativeness of a particular industry we had been trying to market) to make users aware and at the same time acting as a showcase for our core product. My qs: a) What is a typical bootstrapping time for a startup, that is in a lucrative but overcrowded market? b) What are some of the best ways to market on a shoe-string budget? Planning to go to youtube, any thoughts on this? c) Any crowd source fund/site for hi-tech startups?