Hi, I know something that will help a lot.
There's a phone application called Anki. It reviews all sorts of biology (not sure if they have it in other subjects too) that you need to know for the DAT. It is in the form of flashcards and you have to use your phone to study it. When I studied for the DAT I used it as a study material when I was on a bus or waiting in line. It is super helpful and it gives you all the info that the DAT Destroyer questions you on (also a super helpful book). Actually I was able to answer some of the most random bio quesions on the DAT just from having studied these flashcards. They're just way too many so make sure you spend some good time reviewing them. I scored above 20 on the bio section so did pretty well and did most of my bio studying from Anki and the destroyer.
I got them from the DAT Bootcamp. They had an article on how to use the flashcards. Here's a link that will help. Good luck studying and don't quit your job. the test isn't that difficult. You can do it!!
http://datbootcamp.com/blog/how-to-use-anki-to-study-for-the-dat/