Quoted from S2005:Yes, it was $2150 for both wipeout, and blackout together.
First, +1 to not take out a loan for a pin. Bad bad BAD move.
Second, the pins you'd listed playing at other's houses don't play anything like Blackout or WipeOut. Other posts have already detailed how these two play.
But I like your thinking in getting two. I wish I would have gotten my 2nd one sooner, so that way I had a better chance of always having a working pin to play. You will inevitably have an issue on every pin you own that prevents you from playing it. And if you're like me, while I'm slowly getting better at fixing and maintaining my pins, I would much prefer playing them.