Basement Floor Interior Layout Planning and Renovation (70 sqm)

Seeking two refined layout options for a 70 sqm basement renovation. Provide clear schematic plans that respect the existing exterior footprint and all opening constraints: entrance only on the west; no north openings; limited east openings with a window permitted within a 530 cm section but no entrances; no new openings allowed. Deliver practical room allocations: master bedroom, children’s bedroom, family bathroom with shower, guests’ bathroom, living room, kitchen with seating and adjacent dining space. Include furniture placement suggestions (beds, tables, TV), efficient circulation, electrical point considerations, and a brief strategy for achievable airflow and ventilation solutions suitable for basement living.