Goody I know you have just passed your assessment and so I understand your a little nervous about it
Just go over things
1.In law your just performing an PIR so as long as your not going to perform an initial verification on the work and issue an EIC then that is you covered, all need to make sure is that you have a little public indemnity insurance
2. It's work son and in today's climate is turning down work a good thing, You may get remedial out of it, you may even get referrals, so don't blankly dismiss it
3. As for the work itself well your self employed so really you can take your time. If your buckled out with work then sub it out to a local lad and tail him around, the only thing with that is he will take over and most likely deal with the client.
If I were you I'd do it, you can always come on here and ask questions, with luck IQ might be on and he will do it virtually over the net for you, all you need to do it take the money and smile