I thought it would be wise to continue the display discussion, started under 'Dinky of the day', under this new thread.
Believe it or not, my display planning runs over 25 years now! When I built my present display complex in 1990 - when my son got another room in the house and I got a hobbyroom/study for the first time - my ideal and goal was to have a full wall filled with Dinky Toys only. So I built that wall of displays in that room - but the Dinky's to fill it were still wanting! So I designed that 'wall' and put in everything in miniature I had: a lot of Dinky's, but also other brands, my ship model collection, my wife's dolls etc. In all those years I kept a steady growth of the Dinky collection by about 15 items a year, and subsequently the ships and dolls were 'driven out'. I was also continuously improving quality and I sold virtually everything non-Dinky, so the real quantitative growth rate was rather modest. When my daughter left, my wife had a room for her stuff and I built a separate cabinet for my ships in another corner of my hobby/study.
At last, after these 25 years I can really boast the wall of Dinky Toys I had always wished, but I kept the shelving so spaciously and flexible, that with the same rate of growth - not big because of improving quality - I can go for another ten years and then the collection should be even more stabilized than it is already at this moment!
So, to conclude with, in my opinion it's rather a matter of planning and collection control, than a space problem. But of course everyone should follow his own 'collection and display policy'!
I think I should write a detailed article on this display history and construction of mine in the DTCA Journal ... Kind regards, Jan