specs for a netbsd build system?

[Mayuresh Kathe <mayuresh%kathe.in@localhost>]

hello,

looks like my current machine is dying, hence all the problems with
even installing netbsd 6.1.4 on it.

i would be going for a new machine, primarily with the intent of
custom building netbsd for a particular tinkering project.

i have no idea about what kind of hardware would be required for
performing an entire netbsd build within acceptable time-frames,
say 1 hour (without x win).

may i please get advice on rough specifications for the same?
stuff like;
1. preferable processor (intel! amd!),
2. processing power (clock rate, number of cores, cache, etc),
3. memory (size and type),
4. hard disk (space and type),

i have a budget of around us$600.

thanks,

~mayuresh