English proof read of letter and emails on adhoc basis with possible 24 hour t/0

Kind of letter: Business
Topic: Adhoc communication
Tone: Formal/Professional
Outline & Structure: I need letter and some emails proof read and english corrected and english technicalities are good with a turn around of 24 hours.
Extra notes: A good english experience and getting to understand my lack of skill . Mainly letter are about 1000- 1500 . I would like it to be invoiced monthly as it is not much and could keep a retainer in PPH. I would like a price on the woord count. Things also need to be questioned that is unclear (dyslexia)