That's going to be the big difference. Commercial rate for diving around here would be expensive day trips ($350 for a 2 tank) or liveaboards. Maxing out your dives per trip would still require 5 liveaboard trips at $750, so $3700. Or at 2 dives/day at a local mud hole with a $20/day entry fee is $600. Do an international trip some place and you're looking at $4-5000 for maybe a dozen of those dives.
If you have access to beach diving, you are just looking at cost for fills.
Yes I get that. I've just re costed it, for my location, which would involve 2 tank boat dives (that's the diving here) and with my list above its an easy $15k from AoW to OWSI
My point being though is people rarely understand the full costs. Look at any Shop website and you'll see the IDC cost which doesn't seem that much, and looks tempting - unless you read the fine print.
Required training materials inc all instructor slates etc, is pretty much the same as the IDC cost - so we've doubled the price right there
You'll need a Dive medical, unless yoru DM one is still current. If your EFR is over 2 years, you'll need a refresh. Then there's the IE cost then Cert, insurance etc. plus plus plus
So the headline number is just the tip of the iceberg.
When people enquire about OWSI they come in and we chat over a coffee for an hour. (Same with DM's) I go over all the actual costs (as well as discussing the program). We (I) promote AI as a linked course, we offer a really great package deal on it so it's a negligible extra cost. It benefits the Student getting more teaching practice and obviously benefits Staff Instructors wanting to get to MI. 90% of people take it, some do AI+IDC back to back, others decide after AI to take some time before IDC
Some people coming in and finding out the true costs, defer while they save up a bit more money, I'd rather them do that than drop out because of costs.
At the end of the day it does cost a lot of money and people need to go into it eyes wide open. My CD's couldn't give a fig about Platinum Status, they want to turn out quality instructors.
Staff Instructor courses aren't advertised at my shop, you are selected when they think you're ready and it's zero cost to the candidate - everything inc PADI fees covered.