As others have pointed out, those are fires waiting to happen.In addition to reducing fire hazards, cleaning the ducts allows you to inspect.  

An additional benefit of a detailed engineering-based Cost Segregation Study is that it can increase potential insurance premium savings as well as provide support for the property tax appeals process.

Additionally, you might want to consider working closely with your local Public Housing Authority (PHA) to screen applicants more thoroughly or negotiate higher payment standards for better tenant placements.PS: Something that may help you: Baltimore recently passed the Tenant Opportunity to Purchase Act (TOPA), which aims to strengthen renters' rights and provide better engagement between landlords and tenants.

Remember that a rental is a long-term investment with additional financial benefits such as depreciation.

Any additional insight on the process, advice on section 8 investing is much appreciated! 

Often, local lenders will offer additional incentives if the business banking relationship is established.

@Matthew Samson I'll jump on the one CPA bandwagon and provide some additional context to hopefully add some more value to your process.

@Andrew Jessup It's extremely common for the family trust to initially own the real property and then to transfer ownership into an LLC for additional liability protection, with the LLC owned by the family trust. 

Chances are, a guy who can afford $5K in rent will eventually be employed again and want to deal with that judgment you obtained against him.

Therefore, I will make the units as close to ADA-accessible as possible with the least additional cost.