Restaurant Relocation Feasibility Plans

I have a 0.15-acre restaurant site in Hillsboro, Oregon (street view here: https://maps.app.goo.gl/qmyjsRrrhEzP8rNi7). Instead of tearing everything down and triggering a full “new build” permit, I want to reposition or extend the existing structure intelligently... (Budget: $250 - $750 USD, Jobs: Architectural Engineering, Architecture, AutoCAD, Building Architecture, CAD/CAM, SketchUp)