This is an interesting experience you had and is quite applicable regardless of the money. Despite the level of income from each job, the OP's approach is very

This is an interesting experience you had and is quite applicable regardless of the money. Despite the level of income from each job, the OP's approach is very solid. Have an excellent reputation, work closely with your client and build a solid portfolio. That said, I can't speak for any of the marketplaces for coders because I don't code for money (marketing is my trade) but the essence is the same.