Interesting, the feed is high and the plunge very high compared to my useage. Still possible, test first.
Suppose your fretboard averages 2" wide with 20 frets. That’s 40" of slot. If your slots are, say, 4 mm deep, that’s 16 passes making a total of 640" to mill. With a 5 IPM feed, that’s about 2 hours. So, no more than three hours with plunge and traverse times.
Are you familar with fretboard compensation? According to common practice you should also mill the “zeroth” fret, where the nut will abutt. Because the nut will then be flush with the edge of the “slot” instead of the center, the first fret length will be slightly smaller than calculations indicate. This makes the pitch slightly higher but that compensates for the fact that pressing the string down at any other fret also raises the pitch due to the added tension. (In fact, I’ve found it necessary to compensate even more for good intonation. Opinions abound on the internet!)
Wish I had the Nomad for the 30 or so guitars I made.