Obtaining a permanent or temporary residency

I'm planning on obtaining a residency card and could use some advice.

I hope to get it done in a couple of weeks in October. Is that realistic, assuming I have all necessary documents?

Thanks in advance.

Personally, I recommend obtaining the help of a Mexican lawyer. It won't cost much. Have you read through the requirements? As I remember, you will first need to contact a Mexican embassy in your country of origin.