I've owned my own PA, on and off for over 35 years.
Occasionally and only very occasionally i take it for someone elses benefit (my mates)
I was recently asked if I fancied joining a band and doing half the singing with the guitarist doing half.
Which means i would have to use my PA as they dont have one
But it's not a band I want to do at the moment (the guitarists and drummer are utterly superb though and we do a blues rock gig once a year together, which I take my whole kit too and love it too)
The last proper band I was in, the band bought the van, on the understanding if you left, you got nothing. The bass player and original singer owned the PA but when the singer left, he gifted the PA to the bassist. (I played guitar and sang in this band. Everything was put thru the PA and we left everything bar guitars in the van)
It worked very well