Barn Conversion In Portugal

Hi All I need some sugestions on the design for the studio. Because I have limited space at first I thoght I should make a studio a one room studio, but I need a booth for some isolation and maybe Ive struck a good balance of space in this design! I am trying to design in skethup but due to lack of experiance its very basic Do you think the space on the left is big enough to track drums? Its +/- 3.70mx3.10m

I have designed this layout based on one of the garage studio sugestions from the SAE site.