Surely a national stadium? Built brand new, between Glasgow and Edinburgh. Used for football, rugby and a retractable roof for concerts. Rail line, hotel and conferencing, business park style with business tenants providing rental of office space. Forming part of the Scottish sport centre of excellence, so have all the museums, sports science, injury and rehabilitation, tours etc all in one Scottish national stadium. Acts are coming to the Hydro and selling out like hot cakes, so a large scale concert venue with a roof would be viable. Sell hampden and Murrayfield for scrap (nae offence Queens Park)