Single touring using tandem , WHY NOT ??

Seems like the problem with light wheels, front panniers and short wheelbase of the classic diamond bike can be solved by the tandem frame. It is much longer, have heavy duty wheels etc. I am planning on building hybrid , or 1 1/2 long frame with two seat tubes and two bottom brackets , rear bottom bracket will be used for stand. Front wheel will be 36 hole rims with dynamo/brake hub, rear wheel will be 48 heavy duty spokes soldered. Frame will have 5 couplings for easy disassembling, instead of panniers I will have braze ons for two , airline 62 linear inches legal size aluminum cases.