Tick Infestation upon move in

[Sam Faas]

HI all, I had a tenant move in recently and they were supposed to move in with a dog.  They reported seeing ticks upon move in (within the first week) and my pest control person went out there to remediate.  The initial infestation as resolved but since then they have seen some more ticks (3 more) and he should be going out there again later this week.  

I am just wondering if anyone else has dealt with this and what they did?  Also wondering if neem oil and DE actually work and anyone has had success with it?  Found this on the internet but have not spoken to my pest control person about it yet.  Thanks.