kung ayaw mo ng sakit sa ulo mag build from scratch, the current highly recommended budget built bikes right now are the kespor mclaren v2 and tirich horizon. nasa 25k to 28k php range sila and naka-shimano tiagra na, so super bang for the buck na yan. pero kung mag-build ka talaga from frame up, shimano sora or tiagra is already great for mixed road and light gravel. kung gusto mo talaga ng pure gravel experience and may extra budget, shimano grx is the standard. may clutch yung rear derailleur nun kaya hindi tatalbog-talbog yung kadena mo kapag dumaan ka sa mga matitinding lubak. if you prefer a 1x setup for simplicity, sram apex is also a solid choice.