My wife and I have decided on a nice relaxing holiday in Rhodes - so no cooking!

Is it expensive to eat out in Rhodes, I mean is it likely to cost us €50 a night plus €20 for lunch etc?
The reason I'm asking is because we are still dithering over which board to go (B&B/SC/HB ) and I haven't been able to find any indicative prices in any of the brochures / Google.
I will probably have more questions but I'll start of with this one.
Thanks
ab