I agree with others: wait a few weeks and have them closely monitor when the smell is noticed and how strong.  

As a practical matter I can't stop them from burning candles since I can't monitor their behavior all the time.

I also use a system to monitor receipts and match them (bank account credits via email alerts) to statements from property managers.

OR, perhaps they're hoping that if they pay up-front, the landlord won't monitor them or their use of the property after they move in.

Then you need to be able to check for damage at the end of their stay.I'm sure you can google a general liability for golf cart rental.You might want a camera system that monitors and records where the golf carts are parked in case someone try's to tamper with them.

The company that installed them has a guarantee that any new buyer can assume the lease, they guarantee power production and will pay if it doesn't meet certain goals, they monitor the performance, warrantied the roof, and make repairs at no cost to me.  

@Ryan Copeland you have some good suggestions already but just in case Bigger Pockets has some great state forums and usually there are good locals that monitor those.

Hi @Cade Olof, someone is monitoring this thread and will reach out if interested, thank you!

I have a 2 1/2 year old who is one of the main reasons I've taken real estate investing beyond the 2-3 properties needed to develop and test our building monitoring and management software.

Public water systems have to be tested and monitored constantly (except in Flint, Michigan).If it is on a private well, then you can look for a company that tests water and ask them to run a test for around $100.