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That’s exactly it. With Autos, you wouldnt need to get a 24 hour timer. 18-24 hours of “lights on” is completely acceptable the full grow, and light leakage is not an issue.
If you get non-auto seeds, these two things are very important. If light leaks in while the plant sleeping (12 hours of lights out while in flower) you could trigger it to hermie.
If you feel theses are not going to be a problem, I recommend non-auto seeds, as you can control how much Veg-time you do.
Here is a link to some more info on Auto’s:
Happy growing 