Tampons and gaffer tape. Not necessarily used together. Gaffer tape is self explanatory. Tampons can be used as tampons, or for nosebleeds, other injuries, soaking up liquid, or starting a fire.
The best thing you could do is talk to a professional. Find a lawyer and/or accountant who knows the relevant laws in your state. Any advice you get or find online could be wrong, outdated, or not apply to your specific situation.
If you can, wait until they release the new iMac's. Supposedly in the next few months. That's what I'm waiting for, I'm looking at basically the same system you spec'd out above.
RetiCAM smartphone mount $25https://www.amazon.com/gp/product/B00FS5L9D4/ref=oh_aui_detailpage_o07_s...
All metal, screw tight, holds phones of various sizes with our without your case. I never worry about my phone in this thing. It has a 1/4"x20 tripod hole, and it's flat on the bottom so you can use it to stand your phone on any flat surface.
Bucket Boss Cable Bag $15https://www.amazon.com/gp/product/B00GK4U24Y/ref=oh_aui_detailpage_o04_s...
I use these primarily for power cords, but they also work well for long HDMI cables.
To my knowledge there really isn't that kind of laid out plan on this website.
There is a lot of good info. If you have a specific question you can search the boards or post if you can't find anything, or anything recent, on the topic.
If you're looking for something that covers the basics I suggest Creative Live. They have a few different classes on beginning video.
If someone is paying you, do what they want. I know it is boring, but that's the nature of the business.
I've recently started recording a lecture series for a local college. They want full recordings so I can't cut out the stuff I think is boring. The only creativity I have is when to switch cameras.
Maybe you could use some of Casey's techniques for intro's?