[Repeater-Builder] 3 repeater link system

[olan]

just want to ask the group any idea on how you would do this link the simplest 
and the easiest way, due to budget constraint. purely conventional voice 
communication. is it possible to do this using a single channel on the user end 
for the entire system? existing repeater system are 3 cdr 500 motorola vhf 
using basic rick controller. thanks in advance.