james, forget about plans. all you are going to build is a simple 1 bedroom. 1 bath, sm livingroom, sm kitchenette.make the bedroom 12x 24, which can include a 6' wide x 7' bathroom & a slightly smaller[in width]walk in closet. you have used up 12' of your 30', not including wall space,[8"]. open concept for den & kitchenette, mabey a half wall to seperate den. of course if you know nothing about carpentry, eletrical, plumbing, well. miller time again.