I am considering starting a commercial farm in the Philadelphia area.
Answer
Take a look at the Beginningfarmers.org funding resources page
this page includes links to information about USDA Farm Service Agency loan programs as well as information on grants. There is a lot of information to explore here.
You should also look at the links on the PHS City Harvest Grower Resources page, especially the links on business planning. And, if you are not already a member, consider joining the Google group Philadelphia Urban Farm Network. PHS also has a City Harvest program -- see the page on our website to learn more.
Here is a subject guide on Sustainable Food Systems with links to more information.
We have many books in our library on urban agriculture -- both in print and in eBook formats. PHS members can borrow the books and access the eBooks online. Let me know if you want more information on how to do that.
Hope this helps!