at the moment it looks like it will be no bigger than a 2ml tamper proof tank where by you cant change the atomiser, no higher than 20mg nicotine, 10ml bottles of eliquid. pretty much the only way around all this is to have a mechanical mod (metal tube aka: "the pipe bomb") to put your battery in and a dripper to build your own coils on. (what would happen if a copper caught you using it is unclear)
Juice is all good as its just the pg/vg, flavourings and nicotine that are easily available but for companies to be able to sell its a huge expense
It all totally sucks, regulation is definitely needed but not quite to the extent the EU are going for.
On a good note they are now available on prescription (even if it is the Evoke that is owned by British american tobacco)
Good luck with your venture, do you vape?