Proofread my Spanish Articles (Ongoing Work)

I am making an English language learning website for Spanish speakers.
I will be writing content each week in Spanish but my Spanish level is only intermediate.
I am looking for someone to check my Spanish and make it more natural and check for mistakes.

The perfect candidate will be based in Latin America because I want to make use of the time difference as I will have tight deadlines each week.
Must have a good knowledge of Spanish spoken in Spain as well as Latin America.
Must be able to complete work within 24 hours every week.
The price is fixed to £10 each week but will rise if the website is successful.

There will be on average 2000 words.
View the screenshot to get an idea of the website and see my Spanish writing about English grammar.