Question Suggest best older Macbook Pro/Air model for 4k edit

[Tech-Zero]

Hi,

I am planning to buy Mac seconds for short film 4k edit and export. Which is the best previous year/older model Macbook than can do it? I understand that the processing time will be more on older Macbook's.
I have gone through some online reviews which suggests Air 2017 can do it. Which older Pro & Air model support 4k editing without much issues?

 

[hang-the-9]

Find the one with the fastest CPU you can afford, sort by price, then check the models. How slow you want to go depends on your exact needs and budget.

 

[Tech-Zero]

Find the one with the fastest CPU you can afford, sort by price, then check the models. How slow you want to go depends on your exact needs and budget.

How long a 2013 or 2012 Macbook may still run? Is there a risk?

 

[hang-the-9]

How long a 2013 or 2012 Macbook may still run? Is there a risk?

No idea how long a used laptop will run, you can't predict when a computer will fail. For editing video I would not use a 7 yr old computer.