Hello, the job you are asking for shouldn't be difficult; if the audio files don't have an enormous noise, the work will be done in three days, more or less. We're still talking about 87 files (It's not a small number).
Depending on the type of the noise, I will recognize its main characters and remove from all the files changing the phase of the noise audio sample, in this way the noise will be reset by itself. Other techniques of eq and compression may be used also.
Please send me a sample of the audio I will work with, before accepting me on job, we may still discuss the terms of the job.
Greetings, Maksym