Hi Dave I am sure you will get a lot of advice from forum members we have had our apartment nearly 3 years now, we bought of plan and it took nearly 10 months to build, we are very happy with it and one day hope to retire here.
a few words of advice,
Always use a reputable estate agent we used Cenk and Olga and have had no problems whatsoever.
Always use a solicitor we used Ozlen she speaks very good English and is recommended on the forum.
Always research the builder, area, type of house or apartment.
Visit the area on more than one occasion and at different times of the year (make sure it's not just a holiday romance).
When budgeting don't factor on rental income as it's not as lucrative as you may think.
When furnishing your property come to a figure and then double it or don't let the girlfriend get involved LOL.
The only down side for me is that we did not buy a villa and we are reliant on other owners for the likes of maintenance also if we retire here it will be a bit small.