Mold / Health Hazard in Rental: condo association special assessment dispute

I publish illustrative scenarios prepared by my practice. All participants and conversations are fictional. The fictional posts are not posts by real users, accounts of client experiences, or reports of actual results.
Illustrative scenario prepared by my practice.
For informational purposes only. This is not legal advice. Laws vary by jurisdiction. Consult a qualified attorney for advice specific to your situation.
Hypothetical question

English isn't my first language so bear with me. I'm dealing with a situation and need some guidance.

condo association special assessment dispute. I've been dealing with this for about 3 months now and the situation isn't improving.

I have been renting for 4 years. My monthly rent is $909. I have a written lease.

Should I hire a lawyer for this or try to handle it myself?