I'd make sure you have a non-renewal prepared.You could file a report with the fire department that this tenant threatened to burn your building down.. honestly I'd probably make the call if it were me..

Once you actually have a contract and apply for a loan, the banks underwriting department will review it and look at your assets/liabilities and debt/income.  

Anyone have any contacts or suggestions on what department to or who to contact at Citi Mortgage?

If there is actual mold, the tenant can contact the health department and the county and have the mold remedied immediately, or have the property condemned.The landlord CANNOT raise the rent for the cost of abating a health issue.

@Gentry BoswellYou should try speaking with a loan officer in the commercial lending department of whoever you bank with.

Documenting the security deposit via bank statements is the most common, and how "converting departing primary residence into a rental" is usually done if the homebuyer's income doesn't support PITI of both properties. 

I'm checking with the Publishing Department, but I don't believe you can get it without The Book on Investing with Low and No Money Down.

My ping includes a paraphrase of this too: The VA IRRRL sweatshops can eliminate the entire following set of departments, if the entire company is ONLY doing VA IRRRL refinances. 

I also have friends in permit department that made it easier to get questions answered as well.

Windcrest & Castle Hills will have someone from their police departments call you and threaten you, but again, really not much they can do unless they catch you doing it.