It's simply factual:  you violated the lease by smoking, stop it, remove the resulting odor and that a repeat action could result in eviction and loss of security deposit.  

It’s a smart way to dip your toes into investing while securing your first home.You’re not being too ambitious at all!

You must keep the tenants security deposit at a bank that physically operates a branch office in the State of NC.  

Quote from @Kyle Carter: What are some questions that you can ask to each of the required team members(PM, Agent, etc. ) to ensure that goals align and they are best fit.  

Securing financing upfront is paramount.

It's impressive that you secured a deal like this with no renovations and turned it around the same day.

What do you do to ensure that the tenant is responsible for security deposit disputes since that is the largest reason for owner lawsuitsHow familiar are you with the newly changed laws that can affect you the owner if they are not used correctly?.

This ensures you have a proof of concept to show the commercial appraiser.  

Most work with us, some do not.Be careful also as they may tell you to keep their security deposit as last month's rent.

You will receive the security deposit in Checking but then transfer it to Savings.Savings: Hold the deposit here so it's separate from operating funds.