personally I wouldn't recommend Turkey for Buy to let investment.
My family have a 3 bed apartment in fethiye which they originally purchased for a buy to let investment.
The rents achieved are very low from local tenants.
The tenants and agents so far have been very unreliable,resulting in us having to update the brand new apartment within one year and replace many items.
However as a holiday let you could possibly be better off if you have a reliable source to look after your investment.