Here's an article from Marca regarding Pep's spending. It is as the OP says insane!
8/8/2019
It's at City where he's spent the most. Since arriving in 2016 he's spent more than twice what he did at either Bayern Munich or Barcelona. City's spend in his time is 762.3 million euros, Barcelona's was 341.5 million euros and Bayern's 204.1 million euros.
Man. City 2019/20 --> Rodri Hernandez (70 million euros)
Man. City 2019/20 --> Joao Cancelo (65 million euros)
Man. City 2019/20 --> Zack Steffen (8 million euros)
Man. City 2019/20 --> Angelino (12 million euros)
Man. City 2018/19 --> Riyad Mahrez (67.8 million euros)
Man. City 2018/19 --> Philippe Sandler (2.5 million euros)
Man. City 2018/19 --> Daniel Arzani (0.8 million euros)
Man. City 2018/19 --> Ante Palaversa (6.3 million euros)
Man. City 2018/19 --> Ko Itakura (1.1 million euros)
Man. City 2017/18 --> Aymeric Laporte (65 million euros)
Man. City 2017/18 --> Benjamin Mendy (57.5 million euros)
Man. City 2017/18 --> Kyle Walker (51 million euros)
Man. City 2017/18 --> Bernardo Silva (50 million euros)
Man. City 2017/18 --> Ederson (40 million euros)
Man. City 2017/18 --> Danilo (30 million euros)
Man. City 2017/18 --> Douglas Luiz (12 million euros)
Man. City 2017/18 --> Jack Harrison (4 million euros)
Man. City 2017/18 --> Olarenwaju Kayode (3.8 million euros)
Man. City 2017/18 --> Ivan Ilic (2.5 million euros)
Man. City 2016/17 --> John Stones (55.6 million euros)
Man. City 2016/17 --> Leroy Sane (50 million euros)
Man. City 2016/17 --> Gabriel Jesus (32 million euros)
Man. City 2016/17 --> Ilkay Gundogan (27 million euros)
Man. City 2016/17 --> Nolito (18 million euros)
Man. City 2016/17 --> Claudio Bravo (18 million euros)
Man. City 2016/17 --> Marlos Moreno (5.5 million euros)
Man. City 2016/17 --> Geronimo Rulli (4.7 million euros)
Man. City 2016/17 --> Oleksandr Zinchenko (2 million euros)
Man. City 2016/17 --> Pablo Mari (0.2 million euros)
Man. City 2016/17 --> Aaron Mooy (free)
Source:
https://www.marca.com/en/football/international-football/2019/08/08/5d4c15b8268e3e99568b45db.html