Maybe like, a 3? It's definitely a preference. Even if he's not experienced, but is good with his hands and is able to learn things from watching youtube vids.
Growing up, my stepfather was a retired general contractor who always had projects going around the house. I'm actually quite handy myself and have no issues installing doorknobs, dog/cat doors, repairing drywall, fencing, hammering nails, painting, installing carpet, doing a little bit of framing and hanging/texturing drywall, even a little electrical work like installing ceiling fans and lights. I did all of these things when I was a kid. He had me helping put shingles on the roof when I was all of 11 lol.
I hate the thought of having to pay somebody to do things that my partner and I could do ourselves.