So what are you suggesting he buy? It is a big leap in price from a Bushnell TRS-25 or a Primary Arms micro dot to an Aimpoint or Eotech. If he stays with the tried and true budget optics, he will be fine. If he goes off the reservation and tries a budget optic that none of us have or have heard of, that is when he will get into trouble.
He has given his budget, and several have given him some options within that budget. I've always loved the "spend a little more" argument... that is what many told me when I bought my M&P 15 Sport... "spend a little more and get the Colt". Twice the price is not "a little more"...