Yes, but you can spend just as much on other tools.
Which tools are the most expensive? The most expensive tools are the ones that you bought and never use. Sometimes it’s the tool and sometimes it’s because we never “got a round tuit”. 
If you purchase a “tool” and you use it a lot, even if you don’t make money using it, sometimes the joy of the end result just making you feel “happy, wonderful, great” is enough to “pay” for it.
Price is usually justified in perceived value. Bananas for a Rabbit Composer
probably wouldn’t appeal to a rabbit as much as carrots might.
I find the house software is too choppy for my tastes, but Animation Station both of us liked right off.
We have hardware we use. We own/use a Casio WK-3700; Korg TritonLE; Roland JV-1010, FA-08, Integra-7; Terratec Axon; DigiTech GSP-1101; and Yamaha Genos.
The TC-Helicon Voicelive Rack is also a great and fun way to add instrumental harmony; it doesn’t all have to be vocals, it can/will add instrumental harmony just as easy.
I compose for band and orchestra in the same song (mixed) and like to keep these keyboards, modules, and processors busy! 
Now all of this might seem pricey, but just think about all of the VST’s, VSTi’s, and Kontakt (and other) Sound Libraries that are purchased and then never used.
I might also add, because it’s a MIDI effect that can be used with hardware the latency is very, very low. It’s something my dinosaur
Win7 computer can deal with.
Scaler is wonderful, but so is Animation Station now too. I can certainly use it to drive my hardware in my arrangements and compositions.