James & Avery (with Cadence)
"Ah, Harry's the same way. Always outgrowing this or that. Never been so grateful for the basic charms. Expanding ones and such, yeah? They save on shopping."
And without the fortunes of his family here, they ought to be more careful about spending. Though, if they weren't, James would just transfigure more of their paper money. Another easy charm put to good use.