just about afford with chap's LOA
I agree with all you say Training except one thing......
LOA is not there for that purpose. If you've been in the above situation (which it sounds like you have) you'll know that said chap will need to purchase a car on arrival, take a hit with things such as car insurance premiums and be forced to pay hand over fist for deposits due to lack of credit history. Sure, he can take an advance, but it'll take about a year or so to "break even" in my experience (

).
Don't get me wrong, I'm not a CEA advocate, but apportioning LOA in place of CEA is a slippery slope.
Unless you want to up LOA for everyone, in which case I'm happy as my kids aren't school age !!