I think rental costs have gone up for two reasons - 1) The cost of compliance with the new regulations has an effect as owners want to pass that cost on, and 2) There are fewer people renting their places out due to the new regulations so when the supply reduces the prices increase.
On our site in Ovacik, there are 24 villas, and it used to be that probably 75% of owners rented out, or at least "rented" to friends at mates rates. Now there are only three that rent out and they have put their prices up a bit.
Our flights for June/July were under £300 for the two of us, but we have just booked for September and had to pay a tad over £400. That's from Luton - first lot with Thomas Cook and second lot with Easyjet. Still not too bad.