I think for what you want Griff, that'd tick the boxes, but don't pay over £40, £50 very tops if you are the impatient kind!!
Should be hollow cranks, but will have an open bearing bottom bracket spindle, not the end of the world, I've recently sold a crank & BB similar on ebay for £30 BIN.
To be honest, at our skill level, the top tube length of 19.5 isn't going to be much of an issue., I bet Eds Hoffrman isn't far from that.
See how you get on, DON'T get the bidding frenzy, they'll be loads of others!!
Mark