Thanks to everyone - I think, in my mind, I began to answer my own question as I wrote it! The boat is in UK, by the way. I would always have had my own full survey done, just didnt; want to waste time and money on one if it was likely to be a horror show. I'm skipping this barge - lovely as it is, as many thousands of pounds cropping the hull and replating seems imminent, especially after reading the wise counsel here. And I should stop telling people I'm new to boating. I've lived on a steel boat for 3 years now but count myself as a newbie compared with many of my salty neighbours. A Dutch barge has begun to appeal for a few reasons (though extreme agedness worries me) - a wheel house for vantage point and light, and I guess shear character. While a widebeam canal boat has been top of the list, I can't help feeling they're a bit featureless, inseide and out (Cue outraged feedback!) Anyway, eyes open for the next 'dreamboat' ....