Derek,
Tom is probably right, although, you can get slotted into construction if you aren't careful.
Right now, I'm not hiring, but business is picking up again, and I hear similar things from other architects. Not to the late 1990's levels to be sure.
I asked the same question to Dick Nugent during my first week of work there in 1977. You may recall, interest rates were high, America was in a Malaise, (or for the kinky, mayonaise!) and I figured I couldn't possibly stay busy in golf design for an entire career. While I admit to having a few doubts again in the last few years, I recall what Dick said in response to my question:
"Golf's been going strong for over 400 years, its got some staying power!