I believe its not so fun in real life)

You got to build and use air conditioning system. So you'll get high bill for electricity.

You got to build drainage. You got to build gas pipes to kitchen.

You cant just open any window (unless you modified em), and in a daytime - there is not much light actually. You cant really enjoy sunsets unless you build something like in that hotel up in the posts. and its expensive.

It's cool to have it, but it's uncool to live in it all the time :)

And conversion to sim takes a lot of money. Dude in Project727 made gauges using LCD display. Its too expensive to motorize and control real gauges.