What are you going to use for an envelope?
5 motors (62g each), 5 props, 5 prop adapters, 5 ESCs, 5 servos, enough batteries to provide the current demands of these motors.
That is a significant amount of weight.
To get neutral buoyancy, you will need a large envelope.
Where will you be flying that you will use a 1 mile range?
Most RC blimps are used indoors. Their flight speed cannot overcome Mother Nature except on the calmest of days
I googled up some links for you:http://www.southernballoonworks.com/rc-blimps/10-foot-indoor-rc-blimp.html
That is a 10" blimp that can lift 8 ounces (227g). (You have 300g just in motors)
Here is one that is advertised as outdoor:http://www.eblimp.com/eblimps/Remote_Control_Blimps.html
From the videos, it looks like it uses a fair amount of its motor for lift. Reasonable for outdoor.