At what point does owning some spinning wheels, as essential tools in the occupation of spinning, become having a collection of spinning wheels? I think I may have just crossed the boundary. As long as ownership of a wheel can be justified in terms of generalised or specialised use, then that’s a tool to pursue a hobby. But when a wheel is acquired that isn’t faster, more portable, quieter, great for lace or great for art yarns, then just possibly it may be considered that I have started collecting wheels!
Anyway, my “new to me” Haldane Lewis should be arriving tomorrow. I’m really excited and looking forward to taking it for a spin 
That means I will have 5 spinning wheels (that does rather look like it may be a collection). I’m still hankering after a very portable wheel though, so I suspect this won’t be my last! 
Oh, no hang-on! Got it! The justification is that I’m learning all I can about spinning and spinning wheels. Some will be tools I use regularly and some will teach me more about spinning! Not a collection at all! Phew. (Though really, what’s wrong with a collection of spinning wheels?)