I recommend Bologna if anyone fancies a team not in Europe and with some decent young players. The squad is pretty much already built for a 433 DM with inverted wide players. They have multiple options in each position across the team. You don't really need to make any signings to start with to easily achieve clubs modest midtable/avoid relegation battle goals.
Arnautovic is fantastic and can still go for a few more seasons. And along with Gary Medel are perfectionists so great mentors. You've a handful of really good early/mid 20 year olds players who are established in team (Emanuel Vignato, Nicolas Dominguez, Jerdy Schouten, Ricardo Orsolini, Mussa Barrow and Jhon Lucumi) who should all be capable of growing as you push up league. And you have a really strong long term 17 year old prospect in Wisdom Amey. Aswell 19 year old right back Denso Kasius.
I'm not 100% sure of state of long term finances but you could certainly cash in on 1 or 2 previously mentioned players if you need to rebuild/freshen up side.