Only problem i would see is how would tou run ur water lines to were they are not on a exterior wall other than building another wall which would eat up alot of ur living space
Huge question guys? What type of commercial water main pipe does everyone use in other states other then ohio? Here in ohio we use Ductile steel pipe with mega lugs
For the answer to A & b thats a venting problem. for the answer for C thats because the toilet got air into it and started to flush. check to see if there is a vent and if there is check to see if its clogged