Looking for some ideas on a two bathroom remodel. Or whether I should bother at all. Here are the details:

Master is 4' x 8'
Spare is 5' x 8'
They share a wall and are mirror images of each other (except master has shower only). See attached layout and pics.

My main goal is to make the master bigger. The ONLY way to gain more sqft is to bump out into a hallway on the other side of the spare bathroom. (See attached image of one redesign option).(Master bath is locked on all side except for moving the spare out). This would require extensive work, moving walls, breaking concrete and rearranging all plumbing.

I've gotten several quotes from contractors and they are all around the same ball park: 35-45k. I have the money, but not much left after.

This is a 500k home I plan to sell within 5 years. Is it even worth doing? Would I recoup the cost selling it in a few years? Would the larger bathroom be more appealing to potential buyers?

All ideas, opinions, comments welcome.

Thank you!