suEXEC is enabled within LiteSpeed, which to my understanding is the suEXEC Daemon, as I do not require a per-user configuration of php.ini.
But LiteSpeed still takes advantage of APC and is even recommended for use, as you can see here
Whilst compiling PHP from within LiteSpeed, you are presented with a page of options for the install and using APC as an add-on module (or xCache, or eAccelerator, for that matter) is as simple as ticking the appropriate box on the set-up menu, as you can see here
And, as you will see in Post #9, you do have an option for a 2-CPU license, by simply working directly with LiteSpeed. I am like you, I find the fee for that license to be rather prohibitive, at least at this time. But I can certainly see why someone with tapped out server resources would consider the license a real bargain.