I used to sell my paintings using the street gallery at 300% markup until I realized that the game is more fun when the sims are struggling.
So whenever I start a new family, I first decide what kind of people they will be, and choose a single way as a money maker - even gardening can get you rich quickly! All you do is fish up a dragon fruit or 2 in Magnolia Promenade and poof, unlimited money growing right there. So I strictly avoid that when gardening is my money source.
And flower arranging has been banned in all my saves too. At first you work at a loss... and then you sell them at 20k a piece when you have a 300% markup on the vendor table
I feel making money through skills and activities have become waaaaay easier than just having a job. Sort of breaks the game a bit.