Started on an interior design suggestion project!

I've been tasked by a relative of a family of 4 to design their future home that will be set for moving in 2019, and they wanted a more comfortable way of planning so I've agreed to it. I have all the positions of the confirmed items they will have in the home prepared. I've had to work a lot around this because they didn't want the 'suggested study' room 'made' because it would make the living room too much smaller but they needed a lot of space for their storage. So I suggested to them instead to use a floor storage cabinet, the kind that becomes just a tiny step off the ground, but is pretty much another part of floor space. They also didn't want any of the bedroom doors to face the toilets' doors, so I had to work around to make sure the bedrooms were not in front of the toilet. The first suggestion I had was for them to knock down another part of the walls for a new door, but that would be extra expense, so I worked around it instead. The older sibling also preferred the piano in her room because she didn't want to install an air-conditioner in the living room, but it was much too hot to play outside. Both siblings wanted to have a gaming-and-work room, so I made the room in front of the toilet a station for games and work. Both of them didn't mind having a small sleeping space, so it was not difficult to get them to agree with having a small bedroom next to each other, separated only by the red suggested wall as shown in the picture. However, this brought up another problem where the older sibling's room has no windows. I suggested to them that they can then change the layout of the floor instead where both siblings' rooms are against the walls with the windows, while the gaming room is a more elongated rectangle on the inside, but they refused that idea, and the older sibling was okay with the idea of not having windows for her bedroom. It is a little bizarre, and that makes me wonder if interior designers outside would actually disagree and then, hence, force the clients to reconsider about such an arrangement, or if they would follow to a tee the clients' requests. The family used to have their refrigerator beside their washing machine, but since this new place had a service yard, I suggested that the washing machine be in the service yard while the refrigerator is either in the kitchen or outside near the dining table instead, to separate the laundry from the food. The reason behind the suggestion of putting it near the dining table, is so that oil and smoke from cooking would not damage or dirty the refrigerator, but putting it in the kitchen would make it easier for access and would not block up the space in the living space outside. In the end they wanted it to be in the kitchen.

So this is how I blocked it out for them first, and I will subsequently look up free models and materials online to replace these so they get a clearer idea of how it looks like. I don't have time to make the models and materials from scratch, and I think it would be extremely time consuming and inefficient for an interior designer to make their own models and/or materials from scratch unless they were custom-shaped items the clients wanted.