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

https://iris-wiki.win/index.php/Creating_the_Perfect_Work_and_Gaming_Desk:_A_Multi-Purpose_Setup_for_Small_Spaces

Planning a gaming setup in limited space starts with choosing a desk about 100 to 120 centimetres wide. This width fits most monitors and gear without crowding. Use a monitor arm to free up desk space and keep your screen at eye level