No the only option there is the Intel RST caching and that would not be the best set up. Also computer illiterate users would have issues with RAID.
I would install the OS, updates, and core stuff to the SSD then change the location that programs and user documents are saved to the HDD.
In regedit go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion and change the DWORD key ProgramFilesDir to the HDD from C, also if you use a 64 bit install change this key to the HDD also: ProgramFilesDir (x86).
To change where User data is stored, navigate to this key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList
and change the ProfilesDirectory DWORD to D:\Users -- and then create the User accounts for the customer.
So I would do all this while logged in as the hidden admin account. Then while still logged in delete the default account I made during setup, change the reg keys, then make a new account that will have those locations applied?