[ger21]

Ouch this is getting expensive...

You can say that again.

So far, I've purchased
8 - LGW15 blocks @ $24.70 each
4 - LGR15 rails @ $28.60 each
8 - LGW20 blocks @ $41.60 each
2 - LGR20 rails @ $132.60 each

I still need the LGR20 X axis rails, which are between $195 and $235 each, depending on the length I choose. I'll probably order them next week.

With shipping, I'm currently at $985, and will finish at about $1500, for 51"x96"+ of travel, with two independent Z axis.
If you compare quality alternatives, it's really not all that much more.