I second the suggestion that you buy Certified Pre-Owned from a factory dealer.
Your injury claim will not settle until you are released by all of your treating medical professionals (including physical therapy, etc.). You must reach a point of "maximum medical improvement". That won't be any time soon to get a medical professional to render that opinion. You will first receive the property claim settlement, which should come after both insurance adjusters evaluate the car for repair.
Lawyers cannot guarantee an outcome. I hate it when clients go out shopping for things thinking a number is going to materialize, before all medical care is completed and evaluations are made for present and future medical condition. Don't fixate on that number, you may not get it. (yes, I am an attorney, but I am not going to evaluate your claim for value so don't ask) The attorney is going to take at least 1/3 (more if the case goes to trial or alternative dispute resolution) plus costs. Read your fee agreement carefully. My math on that 25 grand comes out a little different than yours.
Get your car now, don't wait until you are released by your doctors. That will take some time (probably at least a year) before you are released. Once you settle, you waive any further claim for compensation. Buy what you can afford, not what you hope you will get on your personal injury claim. Go to a Honda or Nissan dealer and look at a Certified Pre-Owned Vehicle. May not be glamorous, but you won't be going in the hole trying to keep up with repairs on it.