Earlier quoted context omitted.
If you're trying to validate an idea, not having to worry about hosting costs for the first year or so could be a big deal. Especially if you're planning to sell out later to a larger company who has so much infrastructure already that hosting is practically free.
Hosting costs for validating an idea run about $10-20/month, not $10-20K/month. Get a shared webhost or VPS and run things on a single box. Even if you are using every programming productivity trick in the book (dynamic languages, 3rd party libraries, RDBMSes, etc.), there is no reason whatsoever why serving 20-100 users should cost $100K. Google had indexed the whole web and was serving most of the Stanford campus b…
Also consider if you are serving HD video or doing financial number crunching over a large data set in the background.