I would like to add a 1/2-3/4 bathroom to a vacation "Mobile Home"
Adding on to a mobile home, no longer makes it mobile. At that point, you have created a stationary structure. Check with local codes. As for just putting in a new bath in the trailer, how large is it?
__________________ Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?