If you're managing that on your current setup (2012 i7 Mini), then the base model (i3/8GB/128GB - $799) 2018 Mini will be able to do the same. However, for a little future proofing... and an upgrade over what you have now... consider the next tier configuration (i5/8GB/256GB) for $300 more ($1099 total).
The additional $200 for an extra 128GB SSD is pretty poor value. If you want/need 256, then the base i5 is a much better deal.
Faster processor, with turbo and an extra two cores.