I'd agree with you if you were looking at the size of the club as it is, but if you look at the demographics of the area, then it becomes clearer why Blackburn in particular represents an interesting portfolio to an Indian investor.
I'm sure Wayne Hemmingway said on a Soccer Am interview that Blackburn only has a population of around 250,000. While I see what you are saying, I just don't see why these people aren't looking like clubs such as ourselves, who already have a really good infrastructure.
You're joking aren't you? That's nearly the population of Newcastle excluding the rest of Tyneside. Blackburn's population is around 105,000. Its tiny.