I'd take issue with that chap on the O gauge forum – I'd suggest most of those who are seriously wealthy in the UK have inherited their wealth or a significant proportion of it.
Your gates – having seen the image and understood what they are wouldn't it have been easier to do them in brass etch as one piece? On the artwork you can specify for the etch to only go half way through the sheet from either side. That would give you the relief you need. The basic artwork would be quick to draw as it's just a repeat pattern. The artwork could be distorted to give a half open version as well. There was a brilliant article in a back issue of MRJ which I bought specifically for this information on setting up artwork for etching, as I thought I'd use it one day.