Thank you for the comments so far on my questions. Several are still open to further info.
A friend suggested, on the paint scheme question, that I might want to paint my first regiment as one of the more common colors, and wait till I'd gotten a little experience before trying to paint one of the "special regiments", so that any early mistakes would be less noticable by being on the less important units. There's some wisdom to that, though I'm still pondering. Lack of funding makes it difficult to decide to paint an "unimportant" unit first, as it's not certain when I'll then have the funds for the important ones. Decisions, decisions. In the meantime, even if I do paint it as one of the regular units (probably the von Lintzer regiment still), I have 4 leftover Musketeers after the battalion is formed. I intend to make use of those to paint test uniforms for some of the other units.
Stokes, thank you for the breakdown on your regiment. That's quite helpful. And to Alte and Jeff and Miniwargamer for the opinions on officers and priming. I'm still pondering organizational makeup. If I save the foot officers as regimental staff, and work with Richard to custom-build packs to suit my project, that might actually work out quite well. Ponder ponder.
On a separate digression, I've been looking for good cheap 25mm goats, pondering giving each regiment a mascot. We'll see if I actually do it.