container locks

we operate a security company using automated container locks . We are requesting principle client to advance funds for CAPEX . 0ur request . 400 trucks per month – we have estimated 1.5 cycles and require 250 units : the Capex for this including the subscription, quarterly fee, duties and licensing : USD 390,000.00 Response from client - "Could you run two scenarios where the capex is amortised into the service cost over 3 and 5 year period. Second scenario where the capex is repaid over the contract period at Libor +3% and there is a fixed fee per mt over the contract period (3-4yrs) with an inflationary escalation clause we deem appropriate? attached excel files with cost / pl