Another option is to purchase two standalone kitchen cabinets and pre-fabricated countertop material in the desired length.
Pre-cast concrete walls: These are pre-fabricated and delivered to the construction site.
If you don't want to deal with construction, though, you can always choose a house that's already been built within the three different neighborhoods or you can place a pre-fabricated home on empty lot.
If you are rather good with your hands you can build your own and if you're not, there are many places you can go to online to buy them pre-fabricated.
Be aware, however, that you may also encounter higher interest rates on second mortgage loans for pre-fabricated housing.