I think that some of the responses so far are rather overkill to the @moonraker question !
Depending on how many LNBs there are on each of his dishes, then a much simpler (and cheaper!) 2-1 or 4-1 DiSEqC may be all that is required.
OTOH, an EMP-Centauri 16-1 switch (albeit with a couple of unused inputs) works fine here for the dish farm at the bottom of the garden
65cm dish should be okay, if it's a Sky dish then it might be a little more difficult due some Sky LNBs being slightly smaller diameter (38mm vs 40mm) but nothing some creative bodging can't fix.thanks Wane get 19.2 and28,2 with two dishes or should i use my 65vm dish wiyh and extion bracket