Hi there,
My name is Tom Whiting, and I have a good bit of familiarity with wordpress, php issues, and the like. It sounds like you're seeing an error that will take a few hours to debug fully, but I'll gladly take a look at this for you and see what could be wrong.
Understandably, my bid is slightly over your budget, however as I mentioned, this will take a good bit of time to debug and get working fully, so my bid is closer to reality than the budget you have in mind.
That said, if you'll take a look at my profile, you'll see countless 5 star recommendations and positive feedback. I pride myself on my work ethic and the level of service provided to customers, and your project will be handled the exact same way.
I look forward to hearing from you and working with you on this project