[iskander]

>A good artist with nothing else can expect to sell a custom painting for $1k, tops.

That's not really right, my wife is a painter without gallery representation who sells in $5k-$12k range. Through her I've met many other people in this "middle tier". A well connected gallery can get collector eyes on your art at fairs like Art Basel and further increase the price of paintings to the higher tens of thousands. Beyond that, there's a relatively small circle of prominent living artists selling for $100k-$1M; these are mostly talented hard working people with distinctive styles that find an eager collector audience. The tier beyond that is an even smaller group of "celebrity" artists -- which is maybe who you're referring to as "hack artists" since it includes some gimmicky work.