Well
I am a bit surprised as you are over the advice of investing in artwork
The truth is I have always been curious about how artist make their money, now I think I just got my answer
They do so when their artwork is invested in, and leased out as you were told
Maybe, there are people who will be able to make a fortune out of this investment though
It could be just by chance or lot of calculations, whereby, they may be able to determine which art piece will be readily sorted for in the market
This could be so that they will be able to overcome the negative part of having to wait like you mentioned for the value to grow
I think you should follow your heart and do invest in projects that you are sure of, instead of taking this financial advice