2150s are nice machines – but designed for small Labs.
If you are only doing 30 prints per months – how many days per month are you printing.
It would be possible to both fill and empty the machine between sessions – but is this practical for your situation?
Personally, I would be tempted to take up the offer (after all it is free) and to see how you come on with it.
You could always sell it on afterwards, if it doesn’t work out
I am not sure how small or large your Darkroom is – but I suspect an installed 215 takes up quite a large amount of room