Not a terrible idea at all. I placed two mirrors across each other in our small bathroom. The mirrors are not of the same width but are the same design and at the same height to maintain simplicity. One narrow mirror above the basin, same width as the basin and tall enough so that our tallest family member at 2m can see their face. The WC also sits next to the basin but I did not want to extend the mirror from the basin. The wall space above the WC allowed for decorative items, eg artwork; narrow display shelf to add interest and texture. Directly opposite the basin and WC is a wide cabinet, and a large mirror to cover that width of cabinet and at the same height as the basin mirror. This mirror also reflects the artwork above the WC. It reflects so much more light and creates a wonderful feeling of space.

correct measurements are the only answer...for your new floorplan you need a room (without any restrictions that would measure at least 2400mm x 2000...it's always possible to squeeze in some minor variations but only if it's worth the cost in convenience, improved value of the property and actual cash outlay.... the front door entry foyer would be lost, the new bathroom doorway wastes more space, the linen cupboards would be too narrow for anything except a few towels and sheets (that can easily be stored in a suitable vanity or bedroom cupboard) the bathtub is gone and you would have spent about $20,000 for a bathroom that is not better than what's already there?? ...the computer programs that we use are called 3D Home Architect and my version 4 is no longer available to buy but i believe siriuskey may have purchased her version recently? these programs do make the plans much easier to see but you must start with accurate measurements and an understanding of spaces needed ...start with a space about 800 x 800 mm for a toilet, 900 x 900mm for a basic shower, 500 x 900 for a single handbasin 1500 x 500 for a double handbasin then add in at least 900 x 900 for a doorway (including space for the frame and space to walk through...same for cavity sliders!) and then you'll need space to walk around in front of the toilet and shower and handbasins ......unfortunately with the plumbing and space restrictions i don't believe it's possible to do more than widen the existing shower space by rearranging the entry wall.(NB you'll still need to spend $5000 to $10,000 for demolition, carpentry, new waterproofing, tiles, shower, vanities wall cabinet, taps, plumbing etc..forget the linen cabinet and store linen in a new vanity and toiletries in a wall hung mirror doored cabinet and keep some width in the entry foyer (minimu 1200 wide) ...removing some of the non structural wall in the kitchen should be the cheapest improvement for the kitchen and add space for a small breakfast bar but removing the end counter would lose valuable counter space that could also be used for a pantry ...before making any decision you need to think about the reason for the changes...are the bathroom, laundry and kitchen in need of immediate repair, is the unit for your own use of needing improvements for rental or resale...?? always happy to draw up your plans but have to nag again about the accurate measurements...try measuring each separate room (ie shower, toilet and vanity, laundry and storage from wall to opposite wall in several places in both directions, ignoring all the fittings but include separate measurement of the diameter of the hot water heater.

You can buy mirrored shaving cabinets of various widths and heights from many outlets, and even on ebay. The crucial thing is to ensure that the edge of a door isn't centered on the vanity basin otherwise your reflection will always have a "crack" down the middle of your face. You should also consider wall lighting as ceiling lights often put your face's reflection in shadow. In this photo the middle door of three is centred over the vanity basin to avoid the issue. Best of luck Dr Retro of Dr Retro House Calls

It is looking lovely Nadia . I don’t believe that here is a right way as both are fine , but it is what suits you practically and visually . The smaller size basis give you two basins while leaving you plenty of bench space .