If you already has another house, you can give it out on rent, which will ensure a monthly income to your family. Go for it man!
Yes that's a good idea that you are going to generate income out of your house. And it is really a good investment if you are going to use your bitcoins by buying an house.
And it is really recommended that if you have a lot of btc's then go buy your own house.
I have my own company,plus i have my second source of income (investing btc,trading btc,sig campaining ) but
i still think it would be very hard for me to buy a house with the money i make .
Yeah, we need many bitcoins to invest on a house. It will takes much time to get many bitcoins, but if i have many bitcoins i will invest it on a house.