The function band I was in didn't go out for less than that. £1600 for a wedding.
The furthest we ever went for a gig was 100miles.
If you're in a pubs cover band, you'll be playing local gigs for around £300. You could do 4 gigs and write off the money to purchase a PA.
A lot of originals bands I see are pushing merchandise at the gigs and as far as I can see that's a good money spinner. I bought a t-shirt at the last gig I went to, £20, and I'll be wearing it out and about as it's a pretty nice design. But I'd not be counting that as 'being paid' for the gig.