Glad to hear! Now you can order a new car and still get the $3,750 tax credit.
Regarding rental car coverage, your insurance company has a contractual obligation to provide you for X days of coverage based on whatever your policy allows for. However, the drive who hit you and caused this situation has to make you whole for all your losses, including any rental car expenses beyond what your insurance company provides for. The problem is your insurance company will likely not fight for coverage beyond what they are obligated to provide for you. Your attorney can make the demand to the other insurance company that they reimburse you for all rental car expenses. Your insurance company will subrogate against the other company for their losses anyway, but the other company can reimburse you directly for expenses above and beyond your policy limits.