The next thing to think about is where you might like your second home to be. In most cases this will probably the first step that people go through: falling in love with an area that you have visited on holiday, wanting somewhere to return to in the area in which you brought up, buying somewhere for your student child to live during their studies - the list is endless. Practical considerations need to be taken into account such as distance from your main home and ease of traveling- factors like this can have a significant impact on whether your experience of second home ownership lives up to your expectations or develops into a chore.
If buying over-seas you need to consider what you would do if the low cost airlines significantly increased their prices or cut routes that you need to rely on. Also, if you intend to spend a lot of time over-seas, will friends and family travel the required distances to see you on a regular basis?