Audio Cleanup (wave file, low complexity)

Small budget. I have two wave files that need to be cleaned up, recorded from a church event using my iPod accessory. The files contain only speaking and they're pretty similar in quality. Need sound amplified, ambient noise removed, and have speaker's voice brightened a little. While the length of the recordings are fairly long, at ~40 and ~60 minutes, I'm expecting/hoping that most will see this as a non-complex case. Okay if final product still has minimal background noise as I don't know if it's realistic to expect anyone to be able to remove all of it. Prefer 50% payment upfront and rest on completion, but no problem with 100% upfront if you have a good rep. I've attached a sample from the file with weaker audio.