As exposure to something encourages other things

1. Does the green section imply "The metropolis is full of artistic opportunities, moving toward post-impressionism, it embraces not only expressionism, futurism, suprematism, vorticism, and a host of other avant-garde movements, but also other more traditional approaches"?

2. Does "Some residents have money and time" mean what it means? That is, some people have enough money and time to spend them on things like art?

Context:

Imagine for a moment London in 1914. The metropolis is a ferment of artistic creativity, as exposure to post-impressionist art encourages expressionism, futurism, suprematism, vorticism, and a host of other avant-garde movements alongside more traditional approaches. Some residents have money and time, and the city attracts the cultured and the ambitious from Australia, Canada, and all over the British Empire. It is stimulating to be in London if you love the arts.