Planning a gaming setup in limited space starts with choosing a desk about 100...

https://connersinterestingblog.theglensecret.com/when-does-a-second-monitor-actually-help

Planning a gaming setup in limited space starts with choosing a desk about 100 to 120 centimetres wide. This size fits most essentials without crowding. Mounting your monitor on an arm frees up desk space and lets you adjust angles easily