Well in Portugal you can get bike insurance for less than 100�/year .. you can rent a flat for something like 800�/month or less, depending on location and everything else, you can even buy a nice T3 flat for around 80.000 �
As to cost of living, well i'm Portuguese, i don't earn that much and still i don't think it's high, i still get to enjoy a good life... for instance, tv,internet 30�/month
gas,electricity, water and other expenses another 100� +/-
monthly supermarket 250� +/-
Now, from a riders view, it's heaven, you are free to ride your bike pretty much everywhere you like, and you got everything from sunny beaches 850km coastline, rivers, mountains, sand, gravel, mud..
Oh and by the way, the say our food is great!!
Whatever you choose, good luck!
https://www.youtube.com/watch?v=qCBFvie-QOo