Our biggest problem is depth not starting 11. We need to get decent players so they can play when we have to much games or injuries, so level is not much lower like currently when we play without Rapinha, Yamal or Pedri.
First sort defense, we can play like PSG if we can't get someone great. Strikers are always expensive, and we are broke.
Upamecano, Guehi are free. Mingueza as RB is alse free on summer. As LB we can get Robertson or someone on low contract for free, but we can maybe also hope so Gerrard Martin can improve a bit after his second season here.
Midfield is sorted. Maybe substitute for Pedri, but that is hard to find.
Then in attack get real talented winger like Fofana or try to get Lookman for low price since he is out of contract.
For really low money we can sort most of our problems. Then in 2027 we can get maybe Harry Kane and we are good.
This is most cheapest solutions all over the field, there are better players on market, but I count on us being broke like last 5 season.