That may only work in countries with lax regulations. Some countries, you're barely allowed to touch anything yourself as far as electrical and plumbing goes.

That may only work in countries with lax regulations. Some countries, you're barely allowed to touch anything yourself as far as electrical and plumbing goes. Or, of course, you could do it yourself - but there's no way you'll ever get your house insured unless certified professionals sign off on inspection. And that is for a good reason - shoddy electrical work can burn down the house, while shoddy plumbing can cause extensive damage.