Neil, try using Metcalf as a base shape then adding gutters, down pipes, roof slates and plastic lintels. Quicker than sratchbuilding, cheaper than Townstreet, more realistic than standard, BUT I still will use Townstreet for the prominent/important buildings or Ten Commandments for the smaller structures (www.castinstone.co.uk). Why? Cos you can't beat a good stonecast model for realism.
