This is not a set to work on in fits and starts unless you live alone and don’t mind having pieces strewn about.
I have read some reviews that state the magnets used to hold it together are not strong enough, but that was not a problem with my set.
He’s learning patience as he prepares his work environment (as a good building environment is required for this large model), and that completion of a large project in one day is not required. Find, somewhere, a manual before attempting. Parts came in sealed plastic bags in discreet quantities, corresponding with the standard manual, making it possible to keep parts separate for each individual step.