If you own a home you should genuinely spend time calculating and thinking about it. It's not near as far fetched as you think. You can benefit from the same technical advancements in engineering and manufacturing that have benefited every single industrial sector. It has never been easier. The number of plug and play components out there is unreal.

These days it's very much sun-legos. You decide what you can afford and what you think you need, and then you bolt the stuff together. Anyone who is willing to put time into it is capable.