Good luck. I'm sure if you build a well made product (and people can easily see online that it's well made by comparisons or something), I'm sure you'll have plenty of 'do-it-yourselfer' business - people that are willing to do repairs on their own without dealer support...if the price is right. I might be that type of buyer. As long as the machine is not overly complicated, it should be easy enough to work on at home, just like the previous generation eXmark Lazer Z.
Photo Gallery of the 'Guy Stuff' (eXmark, Stihl, etc): GALLERY LINK