If you ultimately want to instruct on the microlight which you intend to buy then with your budget you can only be looking at an older Thruster - though you won't be going to France it it too often I don't think.
Some chums of mine go every year to mid France in theirs!! And you can pick up a great second hand Thruster T600N Sprint for not a lot now - the very a/c I learnt in!
A fun and safe aircraft, and very reliable and responsive. They operate on a shoestring and make very forgiving aircraft to learn on. I'd recommend them