since u have the money just go for diploma grads. what for waste 2.3k on ite fresh grads? rename the technican as associate engineer instead to attract good people, otherwise those diploma <2 yrs exp or the ite 5yrs+ exp all dun want to apply and u limit ur applicants.

u have the budget and high requirements, so u need to market the job properly. the word "technician fresh from ite" when appear in job ad will turn off most qualified ppl.