When i bought my first apartment and was handed the existing leases I knew I had some work to do when they were only one page long.
Rather than pay a hefty lawyer fee i drove around on a Saturday to several of the larger and newer complexes and inquired about renting an apartment. The managers were more than happy to show me a unit, tell me what their screening criteria was and hand me a copy of their lease for me to look over.
Once i had several leases in my hands i just sat down and started with the lengthiest one and went through the others and highlighted any item that the other leases didn't have in the first one.
I then typed up a lease that covered everything possible in all of the leases and ended up with an eight page lease. It was a lot of work but the education I received has been more valuable than the money I saved.
And now when a tenant calls with a question about something there are so many times I can refer them back to the section of their lease that covers this issue.