Thanks for all the help motordavid! I think I'll end up going for non RFTs after all, it's a he'll of a lot of a saving in exchange for a bit of elbow grease if I get a flat. I'd be screwed with a blow out with both RFT and non RFT anyway due to no spare. If I end up getting a second hand set of alloys that happen to still have old tyres on then I'll probably practice on them as you suggested, it's a good idea!

Now I just need to work out which TPMs I need.