Harden WordPress & Ongoing Security Scans

My WordPress site was recently hacked. I’ve already restored it from a clean backup and everything is running again, but I want to lock it down so this never happens twice. The priority is a solid regimen of regular security scans... (Budget: $10 - $30 USD, Jobs: Computer Security, Internet Security, Web Application Audit, Web Security, Website Management, Website Optimization, Website Testing, WordPress)