Wait for 2018 Mac Mini Reviews
This is a new Mac Mini, and it's the first one in years. Before you jump into the Mac Mini life, you should wait to see what reviews say about the new model.
Apple's been out of this arena for a while. The new entrant is back with a lot of power and a lot of options, but you will pay for them. The 2018 Mac Mini isn't something you can upgrade yourself later on other than RAM, so you may end up spending a lot of money on a fully specced out 2018 Mac Mini. We're waiting on confirmation, but it doesn't look like you can upgrade storage on your own.
Do yourself a favor and wait to see what the reviews say about real world performance and usability before you jump into the Mac Mini landscape. You've waited this long, another month isn't going to hurt that much.