Dear Nidhal,
There is not any development kit especially for Home automation at all. There are some development kits with some boards featuring the HS08 MC1323x device. For the MKW2x, we have a tower board and a USB dongle so far. You could buy as many of those as your application or proof of concept requires.
We also offer several reference designs you could use to design your own board with minimum efforts and based in a tested-to-work board. You may download them for free form our website. There is also a low cost reference design in the communities.
You will find further details about cost and availability in the product website:
MC1323x Dev kits: http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=1323x_Dev_Kits
MKW2x Dev kits: http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=TWR-KW2x
http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=USB-K...
Regarding to the device to use, both of them (8-bit HCS08 MC1323x and 32-bit ARM MKW2x) would work with current ZigBee Home Automation profile implementation. Nevertheless, the amount of memory in the ARM based MCU, along its performance and other characteristics, is optimal for ZigBee development leaving enough space for custom application development and the continuing improvement and potential growth of ZigBee stack. Having said this, I would still recommend you the MKW2x.
Despite it is not the official supported IDE, you could also use Codewarrior to import the MKW2x ZigBee home automation projects. Just notice that, not being the supported IDE, any issue with it might not be addressed immediately.
I would recommend you to download BeeKit (it is free) from our website and check the different ZigBee Home Automation solutions for both the MC1323x and MKW2x. You could start evaluating whether the MKW2x solutions work properly in Codewarrior or also to check the memory requirements of such solutions when selecting MC1323x as target device.
Regards,
AngelC