Basement Foundation Crack Assessment

I have two cracks in my basement’s poured-concrete walls and another running through the porch slab directly above one of those walls with a crack. I need an unbiased professional opinion before I talk to any repair contractors... (Budget: $30 - $400 USD, Jobs: Article Writing, Building Inspection, Business Plans, Civil Engineering, Construction Management, Geotechnical Engineering, Report Writing, Research Writing, Site Inspection, Structural Engineering)