If any parent here is looking for a way for their child to learn a musical instrument cheaply, they may be interested in what I've found out today.
Further upthread, a poster gave me the idea of having another bash at learning an instrument, following bad experiences at school in the 70s. I've contacted a school for Irish music (the Comhaltas) that's in my city. There are a number of branches around the country - you can find them on this map:
comhaltas.ie/locations/ (click the right arrow on the map to move over to the UK from Ireland!)
The local Comhaltas member I emailed told me: "We meet on Weds evening once a week. Adults/children are taught in small groups in the various corners of the club. There's then an adult's and a children's 'session' for all instrument learners to play together for an hour at the end."
"If you want individual lessons, as a rough guide, most adults pay £3 to £5 for a 30 minute lesson and I think the little ones pay a bit less. If you find that you want to have lessons we do encourage people to join the Comhaltas organization:-cost £8 per year for an adult and £4 for children or £14 for family membership." Comhaltas says it can offer much cheaper music lessons than normal Musicians Union rates (normally £25-£30 per hour) because they have the back-up of being an international organisation
Cost of instruments: the one I'm interested in, (the Uilleann pipes), is pretty expensive - £400 for a set of practice pipes! So I'm going to start with the tin whistle - similar to a recorder, not too difficult to learn to play some jolly tunes on, and can be played in groups with other people/instruments. And tin whistles are as cheap as chips (like, £5.99). So that's me sorted!
Comhaltas also teaches fiddle, concertina, button accordion, harp, banjo and bodhran (Irish hand drum), and can put you in touch with teachers of other instruments.
So it's not classical/orchestral, but it's a cheaper way for the cash-strapped who just want to enjoy making music.