Scott, can you tell us more about Peru?
Peru is enjoying a good economy, with a fast-growing middle class--at least in Lima. Peru had one of the fastest growing economies (percentage wise) in the world, or at least that's what the country's president said last year. Outside of Lima, I see much of the fruits of the improved economy.
My wife and I were able to live in Peru for about $1300/mo, which including rent, food, travel (lots of it). We were missionaries there, so we didn't live high on the hog.
I didn't meet any ex-patriots while there, but I did meet a couple who spends their Canadian winters in Lima and their Canadian summers in Canada. They had a nice condo near the beautiful beach in the upscale Mira Flores area. DW and I went to the condo once. It had a spectacular view of the Pacific Ocean. I don't know how much it costs them.
Things in Lima seemed to run well--good telephone and Internet service in our apartment and good public transportation throughout the city. We lived there in a gated, guarded community, so we felt safe. Well-to-do people who lived outside of guarded communities needed good security systems. Those who didn't got robbed. (Some Peruvian friends of ours got robbed three times before getting their security system installed!)
In the mountains, where we lived for 7 months, we felt safer. Peruvians seemed more honest and didn't try to overcharge us as the taxi drivers did in Lima. But the mountain towns seem to have more strikes, which shut down public transportation for a couple days at a time. (We didn't have our own car, so we relied completely on taxis.)
I would hesitate recommending Peru as a retirement location unless the retired persons spoke Spanish and/or had other with Peru or Peruvians.
I can't think of what else you might want to know.