With my faux pas in stating that we would be using laptops, this has generated another thought and question:
First --- thank you to Vekseid; Lrrr; and, Psi for responding ---
Another person has sent me information via PM, so thank you to him, too.
Would using laptops be more efficient than having three separate PC's built? Additionally, if utilizing laptops for this, would it also be feasible to have a general "server" that would hold all the client/user files in which the three of us would be able to access at any given time?
I have also been doing research on off-site back-up of our files --- the "cloud" and all that. To be honest with you, I wish that I was more "literate" on computers as far as RAM/GB etc etc etc.
Again, thank you all for responding, I appreciate it!
First off. Are you planning to be doing work at anything other than your desk? yes - than laptops are beneficial. no - than laptops are not.
Second - having a general server which can be used to host common files depends. 2 or 3 users - if you share files from one desktop the others can access it the same as a server. It works for onsite, but there is no backup if you have a server vs a desktop acting as a server while someone uses it.
Third - with backup. You can get third party NAS that use a cloud based sync - I use a synology and for 2-3 uses I think all there models support a private cloud (as opposed to Dropbox / Google Drive-Docs). Personally I always use multiple backups. My own equipment has either a Time Machine or Windows Backup depending upon the platform, with a CrashPlan (Third Party that offers free/paid options) backup to a server I own as well as into the "cloud". Every device also then has an independent backup onto an external hard drive via either that HD's own utility - Seagate Backup Plus)
In regards to the backup - unless its a private cloud - I would avoid any and all cloud based backups due to the nature of your work - being a legal firm. This isn't a technical constraint, more a considered view to the privacy of your data, regardless of the encryption of the data.
To give you a profile about me and where laptop vs desktop or laptop vs dual screen matters.
I am an IT Professional, I manage several network enviroments as a Sysadmin. While each has their own Servers and Workstations I personally utilise a personally owned laptop as my main method of managing the network (It runs Mac OS X and also both Windows 7 & Windows 8.1 via a Virtual Environment). One or two of the sites provide me with a workstation. That workstation could be either a desktop or laptop. I use a laptop because I move about, and I need access to my work from any location within any of these sites, or from home.
Where I need to do more "Power User" tasks I often use either my Desktop at work - or my Setup at home that allows a dual screen configuration.
This is often when I am working on comparisons between documents, dealing with powerpoints that have multiple sources of data, or more than one task at once.