answering your questions: change the sliding door to a bench height sliding window and use the salvaged sliding door in the western end of the dining room where the best entry position is for the deck, you MUST have a proper legal drains do not consider anything else...the drain pipe for the garage laundry can be on top of the concrete floor, behind the washing machine and through the sink cabinet and/or under built in storage and only needs a few cms not a whole floor and no stepped up area that you would see or trip over.. the laundry can't be in a separate room as there's not enough space for a separate laundry without compromising the size of the garage...a laundry cupboard 80 cm deep is enough for the washing machine (allowing for the drainage pipe) you could use the old line cupboard to store anything you want but it's not cost effective to change, the entry foyer is already as big as in many modern homes and there's generous flatpac biw space in the small study.... the family bathroom is 2380 x 2370 (ie the old study minus 1m for hall way and wall thickness and, arranged exactly as shown to allow for the wide window there should be space for a bath up to 1800 x 750, vanity about 1200 x 500 and shower space 1200 x 800 and leftover space makes the small linen cupboard with the door deliberately opening towards the shower to use the back of the door for hanging racks for towels and clothes....btw i understood your priority was maximizing separate sleeping rooms and minimising costs...my last plan has five separate sleeping rooms plus the lounge with sofa bed totalling sleeping places for at least 10 people plus the potential for bunks in the garage so you need to decide what is most important and where you're prepared to compromise

We built our house in 1975 and had a similar problem; A teeny tiny family room with too many doors. After several years of squeezing ourselves into this poorly functioning excuse of a "family" room, which has entrances in every corner bar one, plus an entry into the kitchen and sliding door to outside, in a fit of frustration, I decided that our under-utilised formal lounge/dining would be used as a living room with the TV, although we chose to keep the dining table in that room as it is a long narrow room. I made this change 26 years ago. The family room is now just a sitting area with one 2.5 seater couch and a side table at each end, no TV and is a great space for a few people to congregate in to keep the cook company or just to read. However it would have worked equally well with the dining table there. In any case, because of all the doorways, it is really just a walk-through area, but now feels spacious and "settled" instead of crowded and messy. I can recommend the change.....you will feel much less at "sixes and sevens" with your home.

haha!!!! Siri - you can have your Eiffel tower angel... give me the beach any day :) Nic - perhaps some driftwood, shells and a jar of sand might help bring the beach to you - just don't knock your sand flying or you'll literally be able to crank up your fireplace and lie down on your sand to sunbake lol.

your other half is very cute but suggest that he sit on a lounge height chair and see how comfortable it would be to sit with his neck cricked to look up or sideways at an above the fireplace wall hung TV from the close distance in a relatively small room.. the wall next to the window would probably be more comfortable place for the TV with a lounge against the opposite wall and you could embrace the aysymmetry: leaving the space with the storage cupboard as a location for a single lounge chair and/or freestanding (lightweight) shelves or cabinet) and build shelves around the left hand side of the chimney to the window ...depending on what you want to store the shelves could be low with the TV wall hung (at an easy viewing height) or up to the picture rail with suitable alcoves for tv, books, music and display etc and consider a built in electric flame fire to enhance your fireplace