Some current prices for sefl funded types.
ATR42 at SkyBlue STG£18,000 (approx 27K Euro)
737 3/4/5 with Parc Eur27500(linked to Air Asia deal but I am pretty sure if you wanted to just go for a 73type without AA selection then you could do so.
Same price!
Just looking a flight Intl job adverts over past few weeks. Heaps more ATR offers than 737 with zero time.
Just some thoughts to help you think a little before commitment!
rgds,
GP.