My first install I used a DIY friendly version that came with pre charged lines. That went well and is still going strong after 4 years. That one was fine because you can’t shorten the lines but the run was long enough that there wasn’t a huge bundle of hoses. But the garage one I did the non DIY version. I already had a vacuum pump so I just bought the other few tools like the pip flaring tool and vacuum gauges. It’s actually a pretty simple process to DIY, just practice making the pipe flairs before doing it officially.