Followed by your required Fees Upon Termination? 

As a PMC, we wouldn't want to do any free work for an owner terminating our services. 

I provided them with the documents and we quickly discovered that the minimum rental term in this neighborhood was 6 months.

If you have an "early buyout termination" clause in the lease he is free to use this option. 

The batteries last about 6 months in each camera before recharging (aka no wiring either). 

If it’s already stated in contract that it’s $0, then he’s likely talking termination because you’re not following terms by asking.

These types of loans are available to simply acquire the property and are short term in nature (6-24 months).

Just to follow up on this, we hired an attorney and sued them (and won) to terminate the lease without penalties. 

You could tell them that they would need to sign a new contract stipulating if they miss rent payments "X" amount of times it effectively terminates the contract.

In event of request to leave early, we write up an early termination agreement and if home isn’t a wreck, it’s stated that we agree on 2 days (usually a Sat for 2 hours) to schedule appointments with prospective applicants.