It sounds like you are talking what we call here in the states a "handyman". A very valuable guy to have around for the folks that can't ( or won't ) do it themselves.
A good handyman can reliabily repair a broken electrical outlet, replace a bad lock, maybe fix a leaky faucet. A good and honest handyman can be the most popular guy in town.
Not every little job around the house requires an "expert" to set it right.
Reminds me of when was interviewing for a handyman
First person came in and I asked him if he could fit locks "No" he replied
Can you fix a leaking pipe "No"
Can you fit a plug "No"
So what the hell makes you think you are a a handyman? "I only live round the corner" he said.
;D
It is becoming more popular in the States to know more than one trade well. Personally, I started as a plumbers apprentice, then on to carpet and tile, then light electrical and finally framing and finish carpentry. When you can do multiple trades competently you have an advantage over those who need to 'sub' out all but their own trade. This assumes, of course, that you are a new home builder or remodeler.