(I edited out the rant) Let's just say, I seriously question the meaning of the word "professional" now.Niche still unknown:Initially, I thought I would do buy and hold of SFR's or small multi's.

I also tweaked the one I used to include info on our parking lot and a few other things.So, if that's what you mean by needing to add some specifics, you can just add clauses to the contracts in the Nolo books, as they are editable. 

Edit: removed some text

Adding this paragraph using EDIT: The existing tenant will have the chance of evaluating a rent increase by looking at available housing inventory, and comparing your new asking rent against the asking rents in the market.

(I typically make these edits myself as the only changes are the time period and verbiage relating to the duration of the lease.)  

And you can easily edit them to add in your parking rules, etc.

The Nolo contracts are written by lawyers, they're easy to understand by tenants and can be edited to include your rules about parking or whatever.  

In your browser, choose View Source and download the html and then edit the links for what works for you.  

All three units are occupied, so I edited my lease to recreate the same terms as the leases they had signed with the previous landlord.

And you may be able to find all these books in your local library (free) or for just a couple of bucks used (older editions would be fine for educational purposes)...