5-10MB is a big nothing, unless you're talking about running hundreds of images that consume 20-30mb each. in which case you would have some custom image struct

5-10MB is a big nothing, unless you're talking about running hundreds of images that consume 20-30mb each. in which case you would have some custom image structure to minimize everything anyway. But then you'd want to consider the infrastructure development cost vs just buying more iron. There comes a point where you have to take a look at the diminishing returns and say "That's good enough."