All on X treatment plan

I am very close to signing off on a treatment plan from a Prosthodontist for an All on X. I was able to get the price from $80,000 to $62,000. This has me traveling out of state. There is a general dentist in my state that is $40,000 for both arches, which would obviously be much better financially, but I am concerned about the pricing being so much less.

What makes one dentist charge 60,000+ and another 40,000?

Is there anything in particular I should watch out for?

Sorry, this forum is for dentists to ask clinical questions or post cases. We cannot respond to patient questions or address costs of procedures.