You mean to be your lawyer? Have you done a quick search on FD? There are tons of questions and discussions on FD about this, here's the topic
http://members.founderdating.com/discuss/topic/Legal
http://members.founderdating.com/discuss/2376/Startup-friendly-programs-by-larger-law-firms-what-to-consider
http://members.founderdating.com/discuss/3173/What-do-founders-look-for-when-selecting-legal-representation
You'll see that any big law firm does a deferment of costs for a certain period or until you raise funds.