
Other DAWs have less demanding disk requirements. Hopefully you Mac has a nice fast SSD and you can use that for the audio and VI samples and boot/system drive. Pay attention to the minimum systems requirements, if you are running hard drives (not SSD) then Pro Tools should have a dedicated audio drive, so you do have that cost. I'm not sure I understand the disk cost comment at all. There are many great DAWs that cost less than Pro Tools including Reaper, Ableton Live Lite, Logic Pro, and Garageband (yes seriously). So if using those you also have to pay attention to this driver compatibility table: (not officially supported may not mean does not run, but this is an end of life product).
DAW FOR MAC OS X 10.6.8 DRIVERS
That will run on all OS X/macOS versions with it's USB class compliant compatibility, while a 002 requires separate drivers with more recent versions of Pro Tools (9 and later?). You can pick up modern interfaces starting at relatively low cost, like a Focusrite 2i2 starting around $170. Unless you are experienced with these old systems and need one for compatibility or other reasons I expect you are better off working with a recent DAW release and a modern interface with good current OS compatibility. soundBlade HD masses all the power and features of the soundBlade family into one complete workstation for mastering, archiving, mixing, and post-production. 32 Lives is compatible with virtually all 64-bit Audio Units and VST host. 32 Lives is a transparent 32-bit to 64-bit Audio Units and VST plug-ins adapter, which enables you to run your favorite 32-bit-only plug-ins, such as Vanguard, VB3 and TC PowerCore plug-ins, in your latest 64-bit DAW. 32 to 64-bit Audio Units and VST Plug-ins Adapter.
DAW FOR MAC OS X 10.6.8 FOR MAC OS X
An old 002 and an old version of Pro Tools may be a lot more hassle than you expect. For macOS 10.6.8 Snow Leopard -> macOS Mojave. The Mac OS X 10.6.8 Supplemental Update is recommended for all users running Mac OS X Snow Leopard 10.6.8 and resolves issues with: Transferring personal data, settings, and compatible applications from a Mac running Mac OS X Snow Leopard to a new Mac running Mac OS X Lion Certain network printers that pause print jobs immediately and fail to. Qlab For Mac Os X 10.6.8ad Mac Os X 10 6 8.
