Sieg X3 CNC Conversions Done??

Hi, new to the group and to CNC machines in general. I have a
manual 8x14 lathe and want to expand my capabilities with a good
small to mid-size mill, without spending more than $2k-$3k. I like
the idea of CNC, but am concerned about the smaller mill's
capacities. I'd mostly work with aluminum and sometimes steel for
use in making brackets, pulleys, etc. for racing go karts and some
small car parts. I'm patient so if light cuts are needed, that's
ok. X-Y travel distances of 12"x6" are big enough, but I wouldn't
want to have much less than that.

So I'm looking for advice on the best approach - The Sieg X3 seems
to have pleny of capacity for my projects, but obviously is not "CNC
Ready". For anyone who knows the X3 machine, can you tell me what
would be involved, how difficult, and approx how much $ it would
take to do a CNC conversion on the X3. Otherwise, I'd appreciate
any advice on suitable alternatives.

Thanks,
David Anderson