Well that depends on what wax you are using, if you are using a pomade wax (like Murray's beeswax, which I do not recommend, they are greasy and they will make your dreads fall apart) you will have to use a lot because it does not hold the dreads together.
If you use the DreadHeadHQ, or Knotty Boy you will be using a finger full of wax on each dred (depending on how thick the dreads are and how long they are).

It depends on which method you use. Check out the methods section in FAQ Part 2 to find more information about the method you want to use.

You can use the DreadHeadHQ, Let's Dred, and Knotty Boy products on already dreaded hair. I do not recommend the Knotty Boy shampoo, though, because it has all kinds of added scents that leave incredible amounts of residue behind.

It's really not a good idea, most of the things you could use like eggs, honey, and glue will really mess up your dreads and hair, and you will probably have to cut your hair off.

Can I use beeswax/honey/Aloe Vera/etc. to dread my hair?

Regular beeswax is very brittle, it will be really hard to put on the dreads unless you melt it and then put it in. But as soon as it dries it's just going to chunk off, and leave little pieces behind, that will hold dirt and make black spots in your dreads.

Honey is very sticky and it is not very thick so it will just coat the hair like gelatin would and not help hold the knots together in the dreads. It also attracts bugs and dirt.

The only thing Aloe Vera can be used for in dreads is to condition them, but it will not help the dreading process when the dreads are new.

Is aloe good for dreads?

Aloe Vera can be used in dreads to condition them, but it will not help the dreading process.