Hope this helps a bit
You should follow the supplement instructions on this
site. Here are some links to the products recommended and used by a lot of people on this forum.
Calcium with D3
Calcium without D3
Vitamins
I noticed and so did a few others. You need some UVB lighting for your little man.
Fixture
Lamp
I also noticed you are using a red lamp for heat. You should change over to a daytime lamp. Your cham will see the light better. I know you said the lights are on for 14 hours. You should try and keep the length of time they are on in sink with the amount of time the sun is actually up. In summer run the lights for 14 hours but go down to 12 maybe 11 hours during the winter. Your cham will get used to the amount of time the lights are on. My boys will 'get ready for bed' about 30-60 minutes before lights out. Also do not provide a 'night time' heat lamp for your guy. If the temp in his cage is dropping below 60 at night you should use a
heat coil. Only do this if his temps can't be kept above suitable levels by other means (room heater) at night. Do not use a heat coil as his daytime heater. He won't see it and won't know where to bask.
Heat lamp
As for cages. Your guy will require a 24"x24"x48" cage. These cages were on sale earlier this week... I am bummed I didn't get one in time and they are no longer on sale

They are worth the money though.
Cage
I know you said you were going to buy a cage. If you did run out to Petsmart or Petco or even a local reptile shop, if you purchased a reptarium, you should buy a
higher output UVB lamp for the cage. The meshing stops a lot of the UVB from getting to your cham.
If you did end up at a Petco or Petsmart, PLEASE don't rely 100% on the tips they give you. If I were you, I would come back here and ask the people of the forum questions before making final decisions that could cost you lots of money. Do not let them sell you a
compact fluorescent UVB lamp. Please read through the site provided. You will learn a great deal. It is very important to your chameleon that he is provided good lighting in order to thrive and survive.