i am thinking of RCs as a hobby but i'm still not 100% sure if i want to invest in it.

i would like to know what is the most common size of RCs here sa metro manila.(1/8, 1/10, MiniZ, MicroS4 etc....).

Also, those smaller RC(not 1/8, not 1/10), i'm thinking of not really getting into it because of the lack of variety.
Like, not all brands make MiniZ size cars and MicroS4 size cars.

What i want is variety and lastability.

I want a hobby that will last me for years.

also, i would like to know how much the gas(nitro) is for those Nitro RCs.(with details like gas/time)

Thanks, i hope you people here could help me.