Hard to understand the way Arteta is thinking about his club. I also wonder how he's so obsessed with his rival's players. He brought Havertz, Jorginho, then Sterling (worst ever), Kepa and now Madueke. It gets worsen with how he paid Madueke for 50m, while Chelsea bought him for 29m.
In the latest update, Arsenal is in the progress signing Gyokeres from Sporting. I guess if that transfer doesn't work out for Arteta, and he can consider to sign Jackson from Chelsea.

Arsenal have money and I can see that Arteta is not too worried about paying more if he thinks this player can suit him. And I think it is not a good approach when Arteta tries to renew the attacking line like this, there is very little time left before the start of the season and these players will not even have enough time to adapt and prepare properly for the new season. In fact, Arsenal have a very good team, but they are constantly missing something, and Arteta is trying to figure out where exactly.
His club has money, but he has responsibility to spend it wisely. Paying madueke 50m is obvious overpay, and he will also play as Saka's back up. He should have learned a lot after his Sterling transfer failed last season.