Before I purchased my first SFH I found a good lawyer (who happens to be a landlord, Realtor, and literally wrote a the Arizona Landlords Deskbook).
The lease cost me around $500 but was the best money I could have invested.
A good lease is worth it. There is a good chance at some time your going to end up in court. If you have a good lease your chances of winning a court case are always better. If you have a bad lease.....
There is no reason that you should be paying a "per use" charge for a lease. If you do purchase a lease make sure you get a copy of the lease in microsoft word format (or whatever format you use) so that it's easy to modify.
While I know the LPA has a good lease I just wanted to make sure I covered all my bases and that's why I went with a lawyer who was very familiar with leases in my area.