if you can wait, wait for the M2 mini update as its just around the corner (either fall this year or spring next year)
as for the monitors, I think Apple has that on their website so have a look there. Can't remember from top of my head.
As for Parallels - I haven't tried so maybe take advantage of Apple's return policy, get one unit and test it out. You have 14 days for full refund which is plenty of time to know if it suits YOU.
Would I be able to run 5 monitors off the mini? i see 2 thunderbolts and an hdmi ports on the mini. i have my eye on a utechsmart docking station. so i have plenty of ports but, would the mac mini be able to handle the monitors.