hello newbie here,

I've gone to auto repair shop for an estimate regarding the worn out parts on my honda civic '97. I know the mechanic and trust him. He quoted the part needed to be replaced to a tune off 30K. This is because the shop that he works for is like a casa. Previously, this mechanic offers under the table "home service" but beecause of hectic schedule in the shop he can't accomodate me.
So, i went to banaue to canvass for parts and to my delight I got part way below the quoted price. Syempre, i consulted my freind mechanic if the parts i canvass is good. and he said its fine, basta ung mga importanteng parts like timing belt, and the likes are orig. The auto shops there at banaue also offers installation of the parts? Is this a wise move? Kailangan ko lang kasi mapagawa na to kasi gamitin namin sa holy week and i don't want to use this without fixing the problem. And also, medyo higpit din ako sa budget.
pls help.