Hi there,
Firstly, if you are looking for someone to grammar check your PhD thesis in 1 day, they will not give you a professional result.
If you are looking for someone to provide you with a professional result, which I know from previous experience a PhD paper requires, then it would take at least 10 days to check 170 pages properly.
If you are looking for a professional result, then I would be happy to help. If you are looking for the cheapest result, then please choose someone else.
Thanks