VBAC after multiple C-Sections

I am wondering how many ladies have been presured to a section. Most public hospitals will say no to a VBAC after multiple sections but I believe we have a choice. We would be well aware of the risks and it should always be our choice. How would you go about speaking to the hospital about what you want in your birth plan? Getting a doula or outside midwife to assist can help but some of us wouldn't have the funds to get that so its all about the public hospital system in why I ask these questions or bring the topic up. I know I am not alone on this.