I have recently purchased a commercial quality metal building (barn) in the country that I would like to convert approximately a third to living quarters for family outings. We plan to build out a complete first floor and partial second floor. I am having a septic system installed. I would like to avoid digging out the concrete to install a first floor bathroom. I have flexibility locating the bathroom along an exterior wall near where the septic system tie in will be located. Would a wall mounted toilet be an option to eliminate the concrete work? Can the discharge be directed horizontally and/or straight out from the carrier for a short distance? I recognize that a tub would still require a platform. Would a 2 by 6 basedpedistal provide enough clearance for the trap? I guess a macerator toilet is another option, again not eliminating the need for the platform. I would appreciate any guidance and experience you would have to help make the decision. Also I would appreciate any reference for fabricating and laying out a platform. Thanks