You can install mac OS X onto a intel pc - google hackintosh if you've got a spare hdd and have a pretty compatible machine.
cheapest mac OS X would probably be a iMac 2"1 or 27" anything from LATE 2009 onwards i picked up mine very cheaply about $450AUD so about 200 euro i guess or maybe a second hand mac mini that you can connect all your existing equipment mouse monitor and keyboard. - or of course for portability a macbook pro laptop 13" early 2011 or newer would be fine - they come with 4gb men and a i5 2.3 cpu
do you have anything over there like gumtree (eBay but with auction and easy buy off people)
second hand definitely all you need. Speaking of "over there" where about are you? Im in Australia, WA