) saves big $$$ from having to send a tech unnecessarily complete an empty trip charge for some batteries. 

Unnecessarily high IMHO.  

We like to have things in place so we can file if we start to feel like they aren't really leaving, but are reluctant to spend the money unnecessarily. 

Involving yourself in forums, blogs, podcasts, and webinars will avail you opportunities to meet engage with members as you ingest informative information.At the bottom of this page is a list with help in it.

Sometimes (but not always) affected by things that they ingested. 

I would like to amend the lease to in some way say that tenants cannot unnecessarily fill their backyard space with crap.

Your $10/night example is unnecessarily ludicrous.  

I would have to say that not 'sure-ing' up your tenants and your property with all the legal documentation necessary so you know your rights, the tenant's know theirs and you don't end up in court unnecessarily, thus creating further expenses.

Also keep in mind I don't want to add things unnecessarily and have expenses without supporting income, unless you think its absolutely worth it!

(Seems to me Doc A unnecessarily splits out Managers then Members on the excess, but since it's in proportion to ownership, order doesn't matter, right?)