IMHO, Looking at the description of mrepo, it's overkill for his
particular situation.
leaving aside the reading necessary to come up do speed with mrepo,
createrepo and such (wich I would recommend anyway if someone deals with
the situation of maintaining a setup alike...), the setup takes maybe 10
minutes more.
Daily business of installing updates is cp/rsync * followed by
"createrepo" vs. "mrepo -ug" - no difference.
If in _any_ case the number of systems raises to two, you will be
hopping mad :)
regards
Jens Neu