Desert cacti (and succulents) make a great plants for those who tend to neglect watering, since they need little if any water once established. However, they do need bright light. Jungle cacti (such as Christmas cactus) and succulents need a moister soil (and not as much light) but even they need less than most plants.
Cacti and succulents can be repotted at any time of the year. Many succulents present no special handling...