You compared the price of top of the line iPads with bottom of the line keyboards, so of course the keyboard looks like the bargain. If instead of comparing an iPad Pro to a Kross 2/Juno DS, you compared a more basic iPad to a Kronos/Montage, you'd draw the opposite conclusion. Neither comparison is terribly useful. But if the OP has a given budget, one could compare the iPad system you could get for that price to the keyboard you could get for that price. And each will be better than the other for some things.Now this thread is just not now making any financial sense to me at all!
You say a regular iPad screen is too small for you... but a Kross or Juno DS screen isn't?