Anything above small is crazy expensive. But then again this is for FC's and not personal housing. So... I'll just point out that for the prices I see things being sold at (Sold. Not just up for sale) lots of people will have large FC housing on day 1. There is no real reason to not purchase the small plot of land now and sell it to someone else down the road when you have the money to upgrade to the next largest. Even on legacy servers a dozen or two members with money wont notice the dent in funds if they all chipped in for the best house.

TL;DR Meh. Its not personal housing yet. Price of small plot easily attainable.