Salons usually charge between $100 & $400 to make dreads. IMPORTANT! Many salons say that they do know how to make dreadlocks, but few really do. They will just put your hair in twist and cover it with gel and call them dreads and charge you $200. The best thing to do is decide which method you would like to start your dreads with, print it, and call around. Just take the directions to the salon and tell them THIS IS HOW I WANT THEM DONE! and see if they can do it. If not, try another salon, you will be able to find one that can make the dreads the way you want them.

How 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.

Aloe Vera can be used in dreads to condition them, but it will not help the dreading process because it will coat the hair causing the dreads to have a hard time locking up.

Probably two. You will probably use a jar when you first start your dreads, and then get another one after the third month, and that jar will probably last a year, if not more.

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 Let's Dred Wax, Knatty Dread, Dread Head, or Knotty Boy wax you will be using a finger full of wax on each dred (depending on how thick the dreads are and how long they are).