I have been cutting my own hair for years. I do it every 2 weeks.
I use an Oster Classic 76 clipper. The clipper heads I use are 1 1/2 on top, 1A, 1 and 000 on the sides.
I go over the areas a few times till the clipper head stops cutting hair.
Does a great job. Very short...high and tight.
The clippers and heads have paid for themselves many times over time considering you can't get the same haircut around here for under $10.00.
$20.00 a month adds up fast.

Pete <:-}