You make very valid points, of course, EMDB. Certainly, part of my problem is it's a very chunky/heavy PC I'm going to be using. The weight I felt would help but it's not so easy fitting the unit in as-is.
At the same time, handling MDF of 8ft length, sanding, trimming, painting and slot cutting does seem more work than a half-size bartop. I do wonder if I should build the bartop and make my first mistakes in woodworking and art there before building the
It would also give me a decent control panel in which to play these games properly and determine which I'd want for sure in the completed full size upright cabinet. Of course, it may also mean the inclination to build it is less as I've got the means to play the games!
Perhaps I should do both in parallel - build an upright and a bartop and see how each comes along. I can abandon/delay one or the other as I see fit. It's more work initially but the 2nd machine can always take the form of a driving machine which I'd seen as my "next" project if I ever get anywhere with this!