Modern Open-Plan Home Renovation Design

I’m about to take possession of a house that still carries its original compartmentalised layout. My goal is to re-imagine it as a seamless, contemporary open-plan home while keeping the character that still works... (Budget: £20 - £250 GBP, Jobs: 3D Rendering, Architectural Engineering, AutoCAD, Building Architecture, Building Design, Home Design, Interior Design, Revit)