I've got two One10s, and one for home use, small gigs and stage monitoring would be absolutely fine.
Having the second cab makes for a very compact, flexible and powerful set up, with t a decent amp.
Paging @Merton who got my hooked on these wee cabs, and sold me one too, he has lots of experience of the One10 and Two10 cabs in proper gigging capacities too.
For the purposes you mention above though, I expect a One10 will be more than enough, and a Two10 might've been overkill anyway
Eude