Never worked with "Amp" flat wire before. So don't know what it costs, all the whips etc. associated with it. Also first time potentially wiring one. Any advice will be appreciated!
Is this power cable or communication cable you are asking about?
I would first try to find out who the local factory rep is your area. Perhaps he already has a takeoff.
Tell him what distributor you want him to quote you through.
or...
Get a catalog (either online or in print),
Do a takeoff of parts needed,
Labor the parts,
Get a quote on parts from distributor.
Local factory rep.? Do you mean someone that works for sprint?