Either material can be made to look and feel beautiful, but the photos show the worst of both. I love baltic birch plywood with exposed edges, but it must be sanded smooth and clear-coated with a satin finish lacquer or urethane. Concrete (my passion and my business) can be tinted to give it a warmer shade, and either cast against a super-smooth surface or polished to make it smooth. Bedroom walls need to look and be touchable. The ones in the photos give me the shivers.

Not entirely sure what's going on here - it seems to be a big room with lots of space for more furniture - so, if you need more storage in the bedroom, get a bigger/wider dresser for the area in pic 1, move the TV out or hang it on the wall, put another dresser (no mirror) in the area where the chairs are in pic 2, and set up your robe in pic 3 so about half of it has two sets of rods, one about halfway down the wall, to hang shirts/blouses etc. Double the storage in that amount of space.

That's too vague a question. What people where? One thing I thought of is if you have a double carport you have the possible option of enclosing the walls later fairly economically whereas building on an extra bedroom is often a bigger task. It's not always that straightforward though and you haven't provided enough information, so take that only as a broad generaisation which might or might not work for you.

My daughter ran her business from her bedroom until they could afford a 3 bedroom house, their 2 bedder with two boys and no where else to fit an office was a very difficult time which thankfully they all survived. Having your office in your bedroom should be avoided at all cost, as you never leave the office behind as my daughter found out. Your bedroom is where you go to relax , I certainly wouldn't give up my sanctuary for anyone, even my kids. You are there full time so it makes sense. Your house already has enough rooms, except for making a small change to allow for another bedroom albeit small next to the bathroom as per my suggestion, Both of these rooms have space for the boys to have a desk (they don't need a lot of storage being part time) The desk in the living area can be built in to hide an office. This is a low cost solution and won't damage resale value. If down the track you can afford the new deck, try to work out to fit a room underneath as a hang out (media) area for the boys. not sure about WA but rooms like these in some states can have ceiling height at 2100, depends on what name!! you give them. My son is in a similar situation to you, except he now lives in a Studio Apartment in Sydney, so when he has his two kids 50 50 they make do in that space and seem to manage very well.