I'm not insulted...LOL I like people to make suggestions. A person can learn things from everybody. And I have great respect for your input, on everything. On the patents...I've done both myself. Hiring outside people to do it is very spendy. If they do the drawings, and the application, it can cost in the neighborhood of $15,000. No way I can do that. Fortunately I can use CAD, and I'm fairly literate, so can write my own applications. But, and it's a BIG but, learning the rules of the patent office, and doing the app in a way that satisfies them, is not easy, or simple. My first app, on the Sweep Jig took me about 200 hours. The second, about half that, though a big part of that was learning to navigate the Patent Office's new software, and I still got it wrong, which cost me an additional $350, or so. If you want to go for it, you need to buy a book, from NOLO Press, called "Patent it Yourself". I wish, before I'd started the last app, I'd bought the updated version, which might have helped navigating the Patent Office website. That book is the "Bible" when it comes to DIY patenting. Don't let me discourage you from the attempt. Any literate person can do this. Just be prepared for the effort you'll need to expend. On sluiceboxes, I assume you're thinking of patenting a particular riffle shape, or contour. if so, that will probably be a"Design" patent, rather than a "Utility" patent like mine were. The rules are somewhat different between them, and I'm not fully versed in the "Design" end, though I had various embodiments of sluice types in my app for the Dry Sluice.
Jim