For an antweight, I would suggest a budget of about £100 - £250. The transmitter/reciever is the most expensive part, and you should use 1mm-2mm Poycarb for the armour. There is no need for a s/c, as the servos which come with the transmitter have one built in.
You need to have the following tools to build it:
Screwdriver (try and buy an electric one, lot easier)
Cordless drill
Hacksaw/hegner jigsaw