I find myself sitting and watching it just because I like watching it, it’s not really a hardship and much of the time you’re watching to see if the changes you made to how you CAM based on what you learned last time have worked.
If I have a part that I’m cutting multiples of, once I’ve seen the whole job run clean on the first (or a cheaper piece of stock for test) part I generally turn on the dust extraction, stick the ear protection on and do some other work in the workshop whilst listening for any bad sounds and periodically checking that everything looks OK. I have not walked away and left the machine running but it doesn’t stop me planing, sanding, doing something else at the same time.
I have a nasty shop vac with some fairly cheap 50mm PU hose to a dust hood on my spindle via a $50 cyclone settler from Amazon, it’s the noisiest part of the setup but it does a decent job of getting the chips and dust off the workpiece.
I like Mike’s outfeed table (not just because it’s nicely made) but be careful of clearance height above the unit if you want to attach extraction or if you want room to upgrade the spindle etc. That said, it’s a good compact solution and if you move the machine you have a nice big shelf still. That sort of table also lends itself really well to being boxed in as an enclosure.
Anything that is flat, level and reasonably rigid will do, the machine only sits on four little adjustable feet as stock anyway, just be careful that the support doesn’t flex or let the machine move around or it’ll be hard to keep things square and level.
I really didn’t like the constant whine of the router cooling fans so I got a water cooled spindle. I find that I really don’t mind the cutting sounds, they’re quite variable, It’s the constant drone sounds that irritate me. Lots of folks have had success making their router less whiny with fairly simple hood enclosures over their machines.
The points about learning curve are solid, but like learning to use any new tool, you develop skills with it and get better and that is rewarding in itself.