i do manage lots of sites in various hosting account form windows to linux and hosting in usa, uk servers from the same and other companies with some on dedicated ips and all.

All of these sites are damn good in ranking and business. i am looking for an advise like i am finding this little diffecult to manage multiple account and regular payments and manageing sites from here and there and some time issue with the host and all...

being a seo company, should we opt to have a dedicated server and shift all of those sites in to a single server on dedicated and some same ip sites...?

Will this create issues in the rankings and all, the new server will be obviously US based and from the best company only but still i am little confused and need expert advice before i take any decision.

is it possible that google take it as a network of sites or something and can harm my reputation and rankings and all...