Sounds like what you have is pretty good. Don't worry about the scores, as I've said many times on other posts, it's not how you are scoring that is important but rather it is important that you understand and read the rationales telling you why your answer was wrong. Just do as many questions as you can as the more you do the more comfortable you will feel and the better you will get at them.
Since you say you are low on $$ I would recommend Lacharity PDA the 2nd edition you can get used for about $20 or the 3rd edition is about $30-something I believe (which is the newest one). Many people, including myself, have found this book very helpful on boards. There is also Lippincott Q&A
Review I know many people who used this book and have been successful on boards. It's about $50.
You could also do questions out of your textbooks from school if you still have them.
There is also the "AN Study Guide" which is free...it is here on this site. It saved me on a few questions on NCLEX.
Of course, what works for everyone is different, you have to find what works for you within your budget but hopefully some of this has been helpful.