Ah, but you only *think* this will be less expensive. These projects not only always cost more than you estimate, you have to live in dirt for what seems forever -- costly in terms of peace and sanity. I was somewhat OK with your plans for the second story. When you got into completely rearranging the first floor rooms, you lost my support. (Like you care! LOL) DH and I lived for 30 years in a house about the size of yours (only one child though). After DS moved out we combined two BRs to have a larger master BR. Didn't hurt our sales prospects; still had a total of three BRs, three baths. The new house we live in now was bought to be a "remodel". I am so grateful we did a teardown instead! All New is always better than Partly New unless you have a historic home. My advice would be to spare yourselves a lot of money that you will NOT recoup and months/years of living in a construction site.

What about a king on the window wall?....A smaller desk could also serve as a nightstand...

One idea, since the room seems large enough, might be to plan your room with the objective of turning the bed so the foot of your bed is closer to the windows than the head of the bed -- you'd face the windows as you wake up. https://www.homedit.com/5-diy-practical-headboards/bed-with-headboard-storage-behind/

Hi interior design , Scandinavian bohemian huh? White's & tans are a good place to start, adding some dark brown leathers & black hardware could really make some understated pops of style in the space. If you want to share an ideabook here on houzz hit me up on my profile. The video below might help as well. Thanks, -frank Build Beautiful Homes