You may have already considered it, but there will be the twin pleasures of transport and storage.
I'm one of an acoustic blues/roots trio and similar to yourself, decided to go down the route of getting our own PA.
As a result, at gigs where we use it we no longer fit into one car. This has cost and general hassle implications.
Also, who's daft enough to keep it at their house and transport it to-and-fro?
Oh yes, of course, that'll be the bass player.