Cat Enclosure & Shed Conversion

I’d like to turn the two pergola-covered side passages of my home into functional spaces. On the left-hand side the goal is a secure outdoor cat enclosure. I want the existing pergola posts and roof retained; you’ll wrap the sides in strong mesh so the cats can see out yet stay protected... (Budget: $3000 - $5000 AUD, Jobs: 3D Modelling, 3D Rendering, AutoCAD, Building Design, CAD/CAM, Construction, Home Design)