Assuming it is in San Francisco and not Daly City @Patrice Pominville is correct in that in order for you to get approved for your ADU application and permit you would have to acknowledge that ADUs are not permissible for short term rentals.

It’s her complete unwillingness to even acknowledge the grace period that is the problem here, not the late fees.

The tenant acknowledged they know it is not on your property. 

I acknowledge that this strategy is riskier than one that's more cash-flow centric, but the rewards can be correspondingly handsome.

Why are you talking about 6% if your acknowledging you're paying the buyers agent commission?

However, communication with anyone there has seemed weirdly hostile, as if we're bothering them; we asked to view the property and they gave us a box code, but the doorways were boarded up with no locks on the doors-they seemed surprised when we told them this; when I asked about putting an offer in the person gave me an email address at a different company and when I asked about that said "oh yeah it's the same company;" I put an offer in yesterday and have heard not even acknowledgement except when the person I spoke to yesterday called forgetting we had already spoken about the house and when I responded we had put an offer in was told they'd review it, but could not be trying harder to get off the phone with me.

Tenant acknowledges the Premises are free of pests at the time of occupancy.

Regularly check-in with them to ensure they have the necessary resources and support to perform their tasks effectively.Provide constructive feedback: Offer feedback on their performance, highlighting areas of improvement and acknowledging their successes.

@Caleb Brown I received the contract the previous homeowner and contractor signed acknowledging the work performed. there is a one year warranty but it is not transferable. any idea on how to request a warranty to be transferable?

By law there is no need or requirement to write a Service Animal into lease, so I get where your coming from I just don't think a campaign of lies is going to help him, if anything it shows acknowledgment of violation AND disregard for that violation.