As long you have connectivity to the sites, that is not a problem at all.
The most demanding activity is to meet all the users request that especially during the first periods are very intensive, plus the local phone lines issues, also always numerous.
For this reason if you do not have the time and experience needed, it is recommended you engage a reputable consultant or certified partner.
For example, I do specialize in such designs, having CME installed in some 15 different countries so far.