Landscape architects are highly qualified professionals, like lawyers, architects and doctors. Some are generalists and some are specialists; some are more interested in the appearance of places and some in their functional characteristics. It is important for clients to find out about a landscape architect's expertise but they should not fall into the Catch 22 mistake of thinking that people can only do what they have done before. They should listen to what they say in addition to discovering what they have done before.
Landscape architects can be paid
There are many approaches
An ideas competition can form an excellent starting point for a large project: