With Spartak Moscow in season 2019/20 I won Russian championship and reached quarter final of Euro cup. No players were bought. Gigot and Melgarejo were sold during season.
Season 2020/21 so far brought only wins. Transfers in: Schurrle (loan transformed to transfer), Musalov, Nedyalkov, Saborit - total cost 13,5 mil EUR
Transfers out: Ayrton Lucas, Fernando, Rasskazov, Djakov, Tashaev, Timofeev, Litvinov - total income 39 mil EUR
Try this tactic with other clubs and tell me about your achievements.
I've tried this tactic with Celta Vigo and finished the league on 4th place.