I live in Virginia and am looking at buying a trailer made in 1985 can it be moved into a different county in Virginia only 40 miles away from where it is setting an be hooked up an everything with no problems?

Shouldn't be a problem, providing it passes inspection in both counties and both counties' fees are paid.

Many places wouldn't allow a 30 year old trailer to be relocated into their county. Check first. Make sure it is road worthy too. Specifically check the frame and then the axle assemblies, particularly if they are still attached.

I assume you are going to need to hire a company that moves house trailers. Why don't you ask such a company?