Sure but you wouldn't pay a chainsaw sculptor to cut down a tree, you'd pay a lumberjack. You can already go to a hackerspace and pay a guy a couple hundred bucks to build you something basic so long as it's mildly ineresting.
With kids growing up playing with Raspberry Pis, in 10-20 years I don't think your comment's parent is such a farfetched idea.
Unfortunately, that's also the story of how Internet of Things (well-known by other nouns) was born.
This works perfectly well for non-so-smart stuff (thermostats, automatic cat doors, etc etc) but when you increase complexity (smart home system) you need engineers with higher qualifications and better expertise. And that's expensive (unless someone volunteers and works for pennies, but that quickly gets stressful - literally not worth it).
(Not like off-the-shelf solutions are any better. They were also born that way - by lowest spending necessary.)
With kids growing up playing with Raspberry Pis, in 10-20 years I don't think your comment's parent is such a farfetched idea.