4 Zone Apartment Speaker Setup

Sup guys,
I want to create a connected sound system throughout my apartment. I have some old Pilot Boxes, which could fill out the living room. For the rest of the Apartment I figured I need about 6 Speakers in total + a 4 zone amp/dac combo.

I want to keep the cost per speaker under 200€ and the amp also should probably stay underneath 500€.

Soundwise I'd like a warmer soundsignature. Soundstage width would be a plus.

Does anybody has advice on where to start this journey in 2025?

EU/Germany

Thanks in advance for any input!