It would be great if you could send me the URL of the website in question so that I can test it, and provide you with a more accurate offer.

You should be aware that I use white hat technics only, in the way that optimization is permanent (unless you change the parameters).

I prefer a fixed rate over an hourly and my fee for the typical speed optimization project is 500$. Testings and a full report of what I've done are included.

*First two days of the project are covered in the above price, and in most cases that should be enough to speed up most websites, if you'd need me to stay longer I charge 300$ per day.

Furthermore, I always test the website after the speed optimization, and I'll provide you with the report of the work completed after I'm finished.

I offer a two weeks guarantee on my work. If I caused some error or loss of functionality, I'll fix it asap with no additional cost to you. 

Feel free to contact me if you have any questions and if you want a top-rated, reliable freelancer with a proven track record for speed optimizations, SEO, and maintenance. 

Best wishes,

Dalibor