Greetings my friend,
I am a expert in making PHP based web crawlers and designing them in a way that you can make them as a cron job.
I've done more than 60 crawling project so you can totally count on me.
Luckily, I have already made craigslist crawler so its not a much of a complex job for me.
Please post more details and the link of your "under maintenance" website.
Hope to listen from you soon.
Regards,
Asad