i would suggest that vacuums with a rotating beater brush are
super good to get out that sand/stone-dust that accumulates at the
base of the hair and very fast can dull even a brand new blade. [it
did not appear that the model you asked about had this feature.]
i personally love the "dirt devil" (mine is over 15 years old --
and in regular use on our horses -- but current models are about $25
at home depot). having the beater brush rotating upward against the
fur really gets out all that deep sand/stone-dust, and thus your
clipper blades last very long between sharpenings. this way, i
generally full-body clip about 10 horses or trace clip about 20 horses
before needing to change/sharpen the blades.
and of course you need a strong enough clipper -- the standard A5
just doesn't cut it.
an article i wrote about clipping and vacuuming to clean the horse
for clipping was published in the Icelandic horse quarterly last fall,
and i would be happy to send you a copy if you would like.
yours, barbara