Hello Richard, nice to meet you, I'm very interested in this project. I like to write product reviews and I have done it with different types of products, also I like technology, especially about automobiles.
I have more than 5 years of experience in content writing more than anything for blogs and of course for product reviews.
I also like the idea to be part of a long-term project and I found very interesting your requirement for writing in a casual and funny style.
Usually, my rate is 10 USD per 1000 words, that's is like 7 pounds. But, I'm open to discuss a lower rate because, as I tell you, I want a long-term project.