If you are already comfortable using a DAW (so learning curve isn't much of a factor), then using it to host a plug-in may not be a big deal. But if you are NOT already comfortably using a DAW for other things, Biggles is right, using a DAW just to run plug-ins is going to involve a significant learning curve, forcing you to understand many things that have nothing to do with playing VST instruments from your keyboard. For playing virtual instruments, it is faster and easier to use a hosting app designed for that purpose. You will be able to do much more, with much less effort. If you only need a single sound, you may not need a host at all, since so many VSTs also can run in a stand-alone mode, as do all iOS music apps. That's the simplest thing to do, if you just need the one sound source. For running/coordinating multiple software instruments, hosting options specifically designed for this purpose (i.e. not DAWs) include Mainstage (Mac), Cantabile (PC), Gig Performer (Mac/PC), Camelot Pro (Mac/PC/iOS), Keystage (iOS).