This is not a DIY project here! You need an engineer to do load calcs and panel schedules etc. You can't do that yourself and you wont get a permit without them for a commercial job. Electrical contractors are not even allowed to design 3-phase systems, even if we know how! You have too many conflicting things in your assessment of loads and voltages. While there are many here that are happy to help in the end you're going to have to get an engineer to do the calculations!
And btw, a 200-amp rated panel does not mean the panel is fed with 200-amps and even if it was you are still limited to 80% of that leaving you 160-amps. An engineer will look at not only the panel and loads but also the equipment feeding this panel. It is not uncommon to see a 200-amp rated panel or even a 225-amp rated panel fed with a 100 or 125-amp service.
Again, you need an engineer!
Good info. Thanks. I have an appointment with an engineer and electrician. At least I have some fundamentals.