FBM
We are creeping off the original thread but its a worthy subject in its own right. You are right, it would be very useful for your friend to have an experienced pilot with recent experience fly with him; there is nothing stopping him from doing so.
You can both fly together with you (the experienced pilot) as aircraft captain, you can let him fly, give him advice and so forth; he can then fly his three solo take offs and landings in confidence and then subsequently fly with passengers. If however he wants teaching he needs an instructor, if he wants teaching by an instructor who has relevant experience he needs to go out and find one.
The choices are clear; if he wants advice from an experienced pilot, fine; if he wants to fly with an instructor for some training or to meet some regulatory requiremnt, fine; or if he wants training by an instructor with relvant experience that's fine too. Three entirely sepatate situations, all perfectly within the rules; your friend, the customer, can choose which one meets his requirement.
Happy landings
3 Point