Hey there! Moving to an Apple-based system for your video editing needs can be a great decision. If you're on a budget and looking for a secondhand or reconditioned system, you might want to consider looking for a Mac desktop or laptop that has a powerful processor and a good amount of RAM to handle the high bitrates from your cameras. As for editing software, you might want to check out Final Cut Pro or iMovie, which are both popular video editing tools for Mac users. Additionally, if you need to compress your video files, you can try out movavi.com's online video compressor https://www.movavi.com/video-compressor-online.html, which can help reduce the size of your video files without sacrificing quality. Good luck with your search, and I hope you find the right system and software for your needs!