I'd look for Bahr or Valspar on sale. I've tried cheap paint and it just wasn't worth it. It doesn't go on well, makes streaks usually, and needs two coats.
You can also buy Bahr with a base coat right in the paint if need be over a dark color.
If going over white or a tan one coat works.
I've seen it go on sale under $20.00 check the ads.
Dutch Boy is another option. What is nice about these paints is that they go on like butter. They are nice and thick like melted butter. Sooooo much nicer then watery paint.