My viva usually cost around RM100 for normal service (Engine Oil, Oil Filter, Air Filter). Looking for around Rm300 to rm400 maintenance cost.

The crz battery is only rm5k for replacement?

Tbh, i use this vehicle to commute to work (40km daily) , also sometime commute back to kg on the weekends
Proton that bad huh...

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Proton makes decent cars nowadays in terms of build quality comparable to Perodua, however the latest Iriz is merely a facelift from the previous Iriz which used carryover technologies from it's bigger brother Preve/Suprima mainly engine platform and gearbox supplier. It uses the dated Campro engine platform and the miserable punch CVT gearbox, combines together you really need to "punch" the pedals to make it move that "helps" to make it a thirsty car but by design it isn't a very fuel efficient engine comparing with most other cars that don't carry the EEV status, e.g. older Toyota Vios, Mitsubishi Mirage/Attrage, VW Vento.

So let's say you don't mind the older campro engine techology even though it isn't so fuel efficient and eats engine oil coz you wanna be patriotic to support local engine design. But can you also stand the CVT gearbox that doesn't give good pickup and helps fuel efficiency either? Not local it's an Australian supplier. So lets say you don't mind all that coz you get a big discount for Iriz compared to Myvi/Axia/Bezza.

Next comes after sales service, imho the only good one from my personal experience is the center of excellence 
The after sales service for proton in general hasn't improved, once you sign the DO the salesman consider job done and assumes the after sales team will handle the rest but they've alot to improve on this.....I think Nissan has improved the most and generally Honda and Toyota are very good at this.
have you own a new proton in the last 3 years?
if not it's a perception problem.

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No money.....scare of learning about cars.....dowan to put effort to find good workshops or spare part shops = buy new local car like myvi or for 100k maybe mazda2.
Just drive, follow service manual for schedule maintenance for next 5 years free service, no need headache.
Don't talk about fun cars coz those you either need money or effort to maintain.