Thanks! I will try it out. 
I would use debian over ubuntu any time! But it’s this one software that i think needs ubuntu. I have not tried if linux mint would work, or other dists…
Why can’t you install whatever distro you want btw? Curious! It’s almost like VMWare right. But set up with xen… Is it not possible to just install any iso in qubes? If not, why?
And could you experts make that happen? That would be great!