actually just looking into it Ange has the highest net spend of any spurs coach relative to his time here, solanke and vdv as you mentioned. But also maddison, johnson, vicario and dragusin. Along with a bunch of expensive teens.
then remember that jose got alot of junk in his time, none of it expensive, gedson, vinicious, Rodon, Doherty, Bergwjin, Hojbjerg.
Conte a bunch of free transfers, lenglet, Fraiser, perisic, danjuma. Along with oppurtinistic buys in kulu, bentancur, bissouma. only really porro and richarlison did the club stretch out
Even poch had to make do and work miracles with alot of cheaper players until after the CL final .
I think Ange has been backed as well as any spurs manager if not better, which ultimately is is still poor because we leave every single manager short of options