Proofreading spanish 3000 words

hello,
we are selling an ebook and we have a funnel.
we have already translated the whole funnel but we would like some proofreading here.

translation is ;

- sale page
- checkout
- upsell / downsell page
- thank you page
- and some words we are using to do advertising on platforms

total words : 3000~

tell us your price + time to do this!

thanks!