Ah... that is true. But I am a Mage - we are known for our quick wits and our cunning natures.
As I said, I will also look into means beyond the use of money...

[Can they guarantee it'll be legal? Nope! Not at all!
But whatever, castle is more important!!]

... Perhaps procuring the land for it would be the most important step.
If the homes themselves are inexpensive, perhaps it would be a worthwhile idea to find one on enough land to build upon at a later date?