This should be done before purchasing hardware, but here's info tho help:

Server Scaling and Load Balancing
http://www.sessioncomputing.com/scaling.htm

Application Installation:
http://www.sessioncomputing.com/aplications.htm

Terminal Server Licensing:
http://www.sessioncomputing.com/licensing.htm

You'll need 1 Windows CAL and 1 Terminal Server CAL for each user/person or
for each client device.  You'll also need one Microsoft Office License for
for each user/person or for each client device.

Only the Enterprise Edition of Quickbooks is supported on Terminal Server,
however Vera Noest [MVP] has some great tips here on getting the other
versions working:

http://ts.veranoest.net/ts_apps_qb.htm

Application publishing is NOT a feature of Terminal Server, so users either
run a full desktop, or a single application.  If you need application
publishing you'd need an application like Provision Networks Management
Framework, Citrix Presentation Server or Ericom PowerTerm WebConnect.

http://www.sessioncomputing.com/add-on.htm#suites