Happy to be proven wrong, but USD 2500 seems unrealistic.
If I pay the remaining amount of $2166.42 to the delivery person over 10 years, that's about ₹1493 per month, which is over 6 times the cost of newspaper subscription. For that amount, yeah, they'll be happy to hang the paper on a wall.
edit: oops I noticed the other comment I replied to wasn't you, but anyway - https://news.ycombinator.com/item?id=36629620
I would argue it's just one more convenient assumption that leads us away from a realistic estimation.
It seems to me USD 2500 is an idealistic best case scenario.
With millions of people living in conditions where even safe drinkable water is not something you are guaranteed to get - 250$/year equivalent seems wild.