I was once told by a VC to never do a patent search as the money spent on the search and analysis would be better spent on developing the idea. Bad advice?
1) You are now aware of the patent and continuing to willfully infringe
2) You're going to spend days obsessing on how your idea is different, or they didn't think of this or that, or this tiny edge case convincing yourself of non-infringement.
In both cases any patent litigation attorney worth their salt will absolutely murder you. The best part is so many broad patents exist that everything infringes on one.
The search is very cheap and easy, and then you can decide if the risk is worth it.