I totally agree Jamesey ...having been involved with construction myself in one capacity or another for the past 36 years. Plant Operator, Tunnelling Foreman, Railtrack Layer, Surveyor.

Naturally I've recommended it....but up to him in the end.

edited to add:...longer actually, since my dad left me and bro' plans and materials to fence the back garden while he was at sea when we were about 10 and 11 years old (he was Royal Navy)....and then later, details and materials for the concrete paths he wanted us to lay while away again, when were early teens.