Senior-Safe Bathroom Renovation

I’m updating an existing bathroom so it’s genuinely safe and comfortable for an elderly family member. The first step is to eliminate any trip hazards: the door threshold (sill) must be removed flush with the hallway floor, and the current boxed-in shower cubicle needs to go... (Budget: $750 - $1500 SGD, Jobs: AutoCAD, Building Architecture, Carpentry, Demolition, Home Design, Interior Design, Plumbing, Tiling)