I think the end of your question has to be a big consideration "the economy"
When money becomes tight essentials become the priority, I am in the catering business and a major cost is the food (depending on how many guests you invite) and I have noticed huge cut backs from people planning weddings over the past 3 years.
The recession is also effecting the wedding planners I work with on a regular basis, this year things have been so difficult for them they have all taken second jobs or moved into other areas of the wedding business.
When times are good and the economy bounces back very good money can be made but I can't see that happening for a few years yet unfortunately.
Take a look at my wedding catering website http://www.eccservices.co.uk/wedding-catering.html - you will also notice links to my wedding catering articles at the bottom that might inspire some ideas.