Variations of this plan are being built all around my neighborhood... http://www.architectsnw.com/plans/detailedPlanInfo.cfm?PlanId=1000 Officially, the master is upstairs (along with children's bedrooms). But, there is the bedroom, well equipped, downstairs should you need to have one floor living. Or, since you have the space, you can build the lower floor bedroom out a bit to make it a true (2nd) master. Or, you could modify. As I mentioned, this plan is being built (in spades) in all kinds of variations in my area. (Here is a variation, smaller/narrower: http://www.thehousedesigners.com/plan/aries-5537/ From that link, you can choose other designs by that designer and get more variations (here is one that is 8' wider: http://www.thehousedesigners.com/plan/castella-5539/ ). I've been in many of these variations as they built a neighborhood of 18 of them immediately behind me. They live well for families. And will live well into retirement and beyond (if not be too large) too. Edited to add... you can (and should) change the roofline on these to have craftsman characteristics. I've seen those here too.

3 bedrooms is a perfectly reasonable resale candidate in most markets. 3 bedrooms and a master with a really nice en suite should be an excellent candidate.

for the windows, I'd consider just getting the arches drywalled over if you can afford it (if you think you get enough natural light with them currently covered up). the problem is that due to the ceiling angles, you can't put a curtain rod above the arches. and those "fan" shaped blinds are so dated. unfortunately this is kind of an expensive solution. regarding your question about the gold fixtures in the bathroom. originally I suggested updating the vanity for now, but that's before I saw the shower. I'd reno that whole room if I could. but if you really can only do some temp fixes for now: I stand by my suggestions from above (small fixes to improve the vanity area). in addition: take that shower door off, patch the holes in the acrylic surround, and install a nice shower curtain. it'll be an instant update, and hide what's going on in the shower. as for all the brass: there are many designers here who think mixed metals are fine. if you updated the vanity area, I think it would work fine.

There seems to be enough space for a walk-in, if that’s what you want. I’d want the view into the room to be the bed rather than a bathroom or closet. But there must have been reasons for the glass hallway, the angled wing... so I don’t feel like there’s enough info/context. What does the architect say?