That’s not too bad, I was thinking in the 1500 range. Will do some digging of my ownThere are also lots of apart-hotels that can be what you are looking for if you want some more privacy, with kitchen and bathroom. It will not be e500, but May is still low-season so you could expect to pay e800-1400.
Cheers m’dearsthere will be tons of locals who will be happily renting out a room in their house for a month. calculate 500€ but it might cost you less then.