Firstly, set a minimum per project. There is a overhead to every project and that needs to be accounted for. Each project needs to make enough profit to buy you lunch.

Secondly, look at any non-key functions that you are performing and see if a Virtual Assistant can help you with.

Thirdly, you have to believe this: people are not that price sensitive. You might be $50 more expensive than other people, but most don't care about that $50, especially if it is paid for by the company, and there are other factors - deadlines, professionalism, etc.

Fourthly, try hard to increase your quotes until 20% of people reject you for being too expensive. If you are in a price competition, you will always invariaribly feel stuck in the future just like you are now.