K3 - hand held light meter question

[hmc4me]

Hi I just purchased a k3 and I am going to shoot some film next week.

I am going to puchase a high end light meter (l-508) in about 3 months (I'm a photography student and need one)

Right now I am out of school on break and don't have access to a handheld meter but I can purchase a sekonic l-188 very very cheap.

 

Anyway I am going to test my k3 next week and I want to get my exposure as close as I can.

My question is should I purchase a l-188 or can I get as good results with the built in meter on my canon camera?

 

I am shooting fuji 250d, I am going to meter off a grey card at 24fps. If I'm right can I not just set my ISO on my canon and set the shutter to 1/60th and use the reading I get from it or would it be better to purchase the l-188.

Thanks

Anthony