I have never used the Cactus mix so don't know how well it works. There are so many different ways to make up your own mix, depending on your growing conditions.
Right now I am using Black Gold potting mix with added perlite and chicken grit mixed in. Once roots are well established I put them out in my raised beds which contain a mix of our local clay, forest compost, sand and chicken grits. I find that the peat that is used for most potting mixes either dries out and becomes hard, or retains to much moisture. It seems to do okay for starting root growth if I am careful about the watering.
You would have to play around with what works best for you. Just keep them somewhat sheltered until they have good root growth. Bright light or morning sun, protected from the harsh afternoon sun. : )
