Question to those who have done/do 1v1 Matches (re: Solaris)

....How long do they usually last? I wouldn't expect more than a minute and a half or so, but I realized I don't actually know. A big part of any hypothetical Solaris arena would be value for money, and the majority of the value you get out of it is in enjoyable matches, not really rewards (for it to be a profitable endeavor). How many matches would make $2 feel "Worth it"?

Edit: Also, are 1v1's even worth it? Do you need to have more people and a FFA style for it to feel satisfying? Or are 1v1's fun by themselves?