Custom gaming tables always sound like too much of an expense. Then you see one and you catch the envies, hard. I know it took some effort to keep my emotions in check after seeing this awesome effort from "Smobolob": a specially-designed, homemade table that plays Catan like a dream, but works just as well for any board game.
According to creator Smobolob, the materials set him back a modest £350 ($620) and consisted of oak beams, sheet wood, felt and other miscellaneous bits (glue, screws, polish, etc.).
His aims were three-fold: build a table that could accommodate Catan and all its expansions; any other board game and situations requiring an ordinary, table-like surface.
Going by the photos, I think we can say it's mission accomplished.
An album is available on Imgur showing the construction process. It also includes a shot with a banana... for scale, of course.
I made a Catan Gaming Table [Reddit]