metro rail red line parking

hi everyone. i have an internship at the mayors office and parking is not paid for by them. so i was wondering if any of you guys know where i can park to reach the mayors office, while taking the metro rail red line. i will be commuting from the alief area. i would like to drive my car to whatever parking is cheap( or a park and ride), then board the metro rail red rail to the mayors office. or if you know any cheap parking garages near city hall that would be great too. thank you. 🙏🏾