motorising the dob would be a big job.. as you can see on orion's scope.. alot of work, time and effort. To simply whack something together would be easy.. but to get something that works at a level that would be usable.. it'd be hard. It's something that I've given some thought to over the last couple weeks. Plus u'r main hardware, which would probably be u'r steppers(u'd need some decent ones) and a couple of good encoders would work out around/over $500.. plus labour and other hardware, encoder box etc it'd get fairly pricey.. add to that initial development costs it'd be hard to make a go of it as a business.. as it'd really only be good for people like orion who are lucky enough to have monster dobs, as pricewise it'd come close to an eq6. but it'd be a great DIY project, which is the way i'm looking at it.
just some thoughts..
el