I can see what Sam is saying. I'm the Syclone he was referring to. I've only recently uploaded my first texture pack here (in my sig) its been a lot of work and there is still a lot to go. It reached 30,000 downloads in its first month and is looking to be quite popular. I put this down to the amount of time and effort i've put in. I've been putting in around 5-8hrs a day/night everyday for 8 months and i'm only 65% roughly in completion. If you put it in those terms that is not an amount of time that many/any would give to one person for nothing/little.
On another note i have turned down 3-4 private requests and these people have discussed with me figures similar to the above estimates and more but i have had to turn them all down as there is simply not enough time in the day.
It would be far more sensible/realistic to use an existing pack and maybe see if the artist will make some changes and additions to give some identity to your server. I'm working with a server on this basis as its all i can offer. Also bear in mind a proper HD pack (not some google images collection) takes much longer than a 16x pack so again think about just what you want from them and their time and what you can give in return.
The other way to look at it is if you find someone saying yes to your request you have to ask what quality the end result will be and if you will be satisfied with it. Then there's the question will they ever finish it at all due to not having the incentive to push through the many hours ahead.
I wish you luck with your request and server
