You do not want a house unless you want to do a lot of house work. I been wanting to get the aerogarden for growing veggies, looks pretty cool. I would need to have it in a closed area as the cat ate all my plants even the plastic ones!!! Probably it would not grow any lemons, but you can always have a lemon tree in a big pot in the balcony.

http://www.aerogrow.com/