A little advice from a guy in a similar situation. A couple years ago, I was building my own camera motion gear to do shoots with for my "real" job as an automotive journalist. Some dudes saw me shooting with one of my rigs, one thing let to another, and we've had two years of $100,000ish gross sales and products all over the world. My wife and dad now work part time when they aren't teaching school and being an old-retired guy respectively.
Forget about patents. Unless it's something SOOOO revolutionary that you could argue couldn't have been created organically by someone else, then pursue one, but understand it's a long and expensive process. And your patent is only as good as you're willing to defend it. And that means money.
We went the customer service route Marketing and selling directly to our "peers" in the industry and providing unparalleled customer service and communication. Instead of underpromising and over delivering, we have a policy of over promising AND over delivering even on that. Sent someone a regular product a day early? What's wrong with slipping in an Amazon card for $10?
I had a guy who was always asking tech questions about an upcoming product. i sent him a huge box of prototype parts, along with a ton of loose parts. Together we came up with an excellent solution.
Don't underestimate the good fortune of being in the market you're selling to. And people will respect you for selling. Sure, some B Shooter is going to want you to "sponsor" him, but try and avoid that. I've gotten around that by only providing product to legitimate media outlets (hard media and internet media) with good penetration. And if I have one I can't sell for cosmetic reasons, it becomes mine until a school or community center calls, looking for a handout for their film program. Then I lose mine.
Bottom line, if you can control every stage of production, marketing and sales—or at least sub them out in a very limited way—do it. Especially if you intend to keep your "day job." As soon as you decide to quit that job, though, all bets are off. Shoot for the moon, because that's all you have left.
jg