Spend the money on SG track conversion.'" "That way you have something useful at the end of the exercise".
Unless you are laying gauge convertible concrete sleepers building anything Broad Gauge is simply wasting money that can never be recovered. Conversion costs the same as rebuilding broad gauge with the exception the job is done and you can move onto sorting out the lack of crossing loops etc.
You then have the obvious benefit of a large wagon and Locomotive pool to draw resources from.
From my prospective it is simple.