Have you seen this post on Built-in Bunk beds? There are actually 4 on this wall, but only 2 can be seen. The area is painted SW Warm Stone. ' If you Google the image, you'll find other built-in bunk beds with a similar paint finish. I love the idea of a bunk room, and wish we had left the space over the garage accessible through the house so we could add them for our grandchildren. Here is a link that might be useful: Built in Bunk Beds

I was also going to suggest twin beds pushed together...it makes sense to do this..You can still do one tufted headboard so it looks like a king bed. Or keep your existing king until it needs to be replaced. Save some money, right? You can get a headboard to attach to the wall (I prefer this, myself). I'm not a huge fan of bed skirts, but there are neater ones with box pleats. What about something like this for the reading nook area?: I've never met a kid who wouldn't love this...I did it for my own daughter (her room was jewel tones so I used vintage saris and stamped gold designs around the doorways--kind of a Moroccan feel). I don't find wallpaper difficult to hang. Especially if you're only doing one wall (corners can get tricky). Repositionnable (self stick) wallpaper, I found to be a real pita. You have a large sheet and it sticks to itself and the wall where you don't want it to (think trying to hang an 8 foot sheet of contact paper). Paste or prepasted is slippy so you can slide it over the wall....SO much easier... My now adult daughter still likes the boho look, and we put three of these at differing heights in a corner of her room in her new apartment. They're not electric, but we got some remote controlled led lights. They're magic. If you prefer the chandelier, there's this one from etsy. If you use a very low bulb, it can stay on as a night light and you can use the bedside lamps for real light...

Update - will be drywalling over the speaker-cubbies. Painting the others to match the trim. Again, thanks to JTerri, whose mockup had me running off to dial our carpentry guy! Thank you, Lascatx. Its been a long post and you may have missed it, but I think we will either move to a city or a warm climate in the next 2-4 years, so not wanting to invest in anything. Especially rugs which are really hard to reuse in new spaces IME. Jterri, I think a piece of modern art could work well, but the odds I will find something i really like, that fits, at a price where I don't care if i can't reuse it in a few years, are kind of nil. But I will give it some thought, as maybe I could do a print. Also thinking of wallpaper/mural. Robo et al, I was thinking about my rug inventory. Their style is not the direction I was thinking of, but they could be worth looking at (and changing direction for). It occurs to me I have a fairly blank slate and a room with so much light. The only color/pattern is from a few throw pillows (easy to toss) and the ticking on the windowseats (neutral). There are three large off white masses -- sofa, ottoman and round table w tablecloth -- that obscure a lot of the rug and so perhaps could tone it down? So I could go with a rug that has a lot to say. For example here are 2 in inventory. The DR rug shown below was in my MBR here for a while, until i changed to a less feminine scheme w a rug I got in India. Here's the rug 10 yrs ago in my old DR in my first house. This one is really ummm, quite ... aggressive in its design. But OTOH I think the floral OTT quality goes with the highly feminine OTT vibe of my octagonal, cupola'ed, windowseated room. PS ....Wow, looking at these rooms, I think I know how I became a colorphobe! My eyes hurt. Psssst, and would you believe, my DR was a rouge color just before the photos above? Not sure I ever posted this before. In my defense it was actually a reddish pink.

I really don't know what people mean by MDF is not structural, MDF must be reinforced or engineered to bear weight and be used as a support structure, but it can be done. My main workshop table is an MDF torsion box and it doesn't sag under far more weight than bunk beds will need to support. I chose MDF specifically for that purpose because it is a more stable surface than anything else. However, the devil is in the details. You can certainly build MDF bunk beds that are strong and don't have any sag, however, there are designs where MDF would not be optimal. It is really hard to discuss without having some idea of the bunk beds. It is likely that a bed builder will add some solid wood posts as it is cheaper and takes less space than doing the same with MDF.