I cannot answer if its what you want that is almost as subjective as asking what color it needs to be when its done.
As far bead blasting, part size is important that determines what you need to buy. The Harbor freight cabinets are at best OK, you will based on my own fupar want a light if you get cabinet bigger then 12"x12". You will also need to get an air compressor of several horsepower, I would say that 3HP is bare min. the least you should get, the bigger the piece the more HP you will need. The media itstelf is also a choice, you can use multiple different types, for alum you might want to use walnut shells or plastic bead. Bead blasting is incredibly messy, the HF cabinets leak terribly so you will need to seal it up the best you can, also its best done outside, otherwise vent to the outside.
The media itself is sucked up through a tube and ejected into the airstream it works just like a paint sprayer does. The nozzles do wear out and will need to be replaced. I purchased the the cabinet last year for $100 and got a cheap compressor(2HP for $)90 because my use was only about 2 square inches. In the end I should have gotten a much larger compressor, both tank and horsepower. Its 2 HP and I can only go for about 10 seconds before I loose most of my pressure even with the compressor running. The nozzle and suciton tube are not the best, you actually can buy the guns at HF to repalce the ones that come with it, those look like they would work better as they have a hopper on the gun. The media can be reused in most cases but it does break down after time. The silcon media esp nasty when it breaks down, it leaves a thin white film which is not good for you all over. The cabinet has a hopper in my case, but you can get ones that don't have them I reccomend you get a free standing unit if you are planning on doing this in volume for the cleanup aspect, also you will need some silcone to seal it up after you purchase it. If you have a compressor already you may want to invest in some tanks for reserve capicity esp if its smaller in size as you use a lot of free air doing blasting.
Any other questions?