Don't forget, regarding the HX50, the owner needs to build 51% by himself. I built several other brand kits in the past and I know what I'm talking about. There is NO WAY you can build 51% in 2 weeks. Also most helicopter pilots I know know absolutely 0 in mechanical assemblies or any other fabrication in general, they are just 'pilots'.
A permit to fly issued by the UK CAA allows you to leave the country for 30 days, no more or you need a special permit. As the HX50 is not (and will never be) EASA approved, every EU country will need its own approval and that will take some time (or never happen).