http://www.thisoldhouse.com/toh/m/ar...204044,00.html
Taylor, above is a small guide to house framing tips. It has six pages but is fairly informative. If you need i can supply links for electrical and plumbing state codes. With the limited space, a shower would be better than a tub. When the time comes for electrical and plumbing, lemme know. Im too far away to come help, but spent a number of years doing this kind of work and will provide what intel i can. I agree with Hunter, making a floor plan is a very important step. Itll help you fully utilize space, and planning to put the facilities near each other will help eliminate excessive wiring and piping. If i get any time off ill see if i can head that way, but time off is rare...if you have paypal or something i wouldnt mind chipping in. Helping people is something i believe in strongly.