fatboyoz
N reg in Europe is not uncommon. There are some very good, large maintenance organisations that have US qualified AME's. I can give you the name of one in Belgium. Don't be put off at all.
Its done to escape the clusterf*&k EASA regulations that we are following.
Getting an export CofA is key.
If it needs SIDS, that can be done overseas as well. Almost certainly a lot cheaper than Australia.
Flying back from Europe is easier than flying from the US. But, I believe crossing India is the hard part (for fuel and other reasons). There are very good GA maintenance and / or upgrade facilities in KL & Thailand. Remember you need a US licenced pilot to fly an N-registered aircraft home.
A mate as an ex- N registered, now Thai registered C210L for sale if you are interested. PM me with your email and I'll send details.
Getting the Aussie CofA (I am told) varies depending on the interpretation of regulations by the LAME. That's why I'd start by choosing the LAME you are going to use here and see what he wants to see.