Interesting idea, but I'm looking for something that can provide transportation, which those really don't.
the link I provided talked about premade trays and cases that fit said trays, including one that was a luggage-style wheelie case which unzipped on top and to the side so you could easily access everything, or another solid steel one that locked.
What I do with mine is stacking crates, 14"x10"x10" which just fit the trays. I put them inside, 3-4 trays to a crate. I can fit my entire D&D collection of 500+ minis in three of those and carry them almost anywhere securely - and can access whatever I might need quite easily.
But I figured, since you probably have a reasonable income of some sort, that you might prefer the manufactured option to do less work. Time = money, after all. :p