House Creation Problems

[[LH]GreedyHuntsman]

I tried to make a house with a friend, but when i click on create a house, it says that i dont have enough gold or FP. I have 500 FP and 60k gold, but i dont know what is wrong. I was told i need to send my friend an invite, but there is no option for me to do that anywhere. If anyone can help me, that would be great.