I have no experience with the Carimali or knowledge of the model lines but would assume its similar to other commercial machines which nearly all use very simlar components.
Do you need a two group machine? They will use a lot more power and often require a 15 amp power source. It will take longer to heat up and heat your house up more! Do you know the boiler capacity and element ratings? Theres a reason they usually sell for less than the equivalent single group.
Assuming its come out of a commercial environment has it been regularly serviced? Is it fully auto, personally Id prefer something as manual as possible as there is less to go wrong with expensive electrics
If space and power are not a problem and you dont mind a bit of DIY and the price is right (Id factor in at leat $200 for parts if the history is unknown)then go for it. Any commercial machine in good nick should be capable of making great espresso, and lots of it. Restoring any machine can be very rewarding if somewhat frustrating at times.