Petsmart or Petco for Reactive Dogs?

I’m still looking for a trainer for my reactive dog because a lot of reactive dog training is so exorbitantly expensive and I can’t afford it currently. I’ve noticed that Petco and Petsmart offer private training sessions for about $250 in comparison to the $450+ a lot of private sessions cost over time. I have an almost 2 year old pit mix who is very very sweet at home but once we’re outside he’s not a fan of most men or other dogs. He will growl and lunge but he has never bitten.

So I was wondering if anyone has had success with private training sessions from either a Petsmart or Petco trainer? Or if they’re even able to do that?

And if none of these are options are there any low cost options you’re aware of that could help improve reactivity?