Rush Limbaugh is characterizing Obama's health care scheme as similar to the "subprime" loan scam: people are assured they can afford the low, low monthly payments when the reality is that those payments will skyrocket within a couple of years.
It's a good analogy.
There's a reason why the Democrats will only quote the cost for the first few years. They don't want to have to start using the word "quadrillion" when stating that costs over a few decades.