This would be for partial boil extract batches or small batches. I don't know how you would get a decent sized, stainless kettle at a lower cost. I'm sure you can, but it's just not coming to mind right now.
Imusa Stainless Steel Stock Pot, 20 Quart - $19.99 + Free Shipping with $25 order
This would be an economical kettle if you recently picked up the Midwest Groupon. Or, this and the Midwest Groupon would be a very economical way for a friend to get into the hobby.