Strictly every six weeks max (sometimes five, but never, ever more than six) - £75 a full set, I think.
My farrier actually does keep her sound though, so that's fine by me. We left it seven weeks a couple of months ago and she went rather lame... expensive, demanding beast!
Every 6 weeks, as arranged by my YO, as I might let them go 7-8 weeks, but she won't. He's here tomorrow in fact!
Full set £55 (YO)
Fronts only £25 (my Mols)
Trim all round £15 (the ol' lass)
My New Forester goes 8 weeks but she is only trimmed, cost £20
My other 4 it depends on what competitions (Endurance)I am doing. During the season every 3-4 weeks as they wear their shoes down. During the off season 6 weeks.
I would never go longer than 6 weeks with my shod horses.
5-6 weeks and pay £60 a set. I am really fussy about my horses feet, and it amazes me how long people will go between shoeings. Even with good quality feet, leaving it that long will cause inbalance in the feet and mean there is additional pressure being put on the structures in the legs. I know people who used to leave them 12 weeks, and have had problems with tendon and ligament damage since. False economy!!
Every 7-8 weeks. I pay 60€ for a full set, including road nails for Vinnie, Lucy has aluminium heart bars, which are more expensive, but she has fronts only. She is 40€ if I have the same shoes put back on (they seem to last ages!) and backs trimmed or 20€ more for new set (including road nails).
Every 6-7 weeks. £60 a set, with trailers on the back. Free refits when horse has lost a shoe.
£35 for just fronts at the moment, due to continual shoe loss!