You "just ordered a set of 4 KT150 power tubes for $139.00 each..." !!!!
I think you can answer your question very well yourself.
I asked myself the same question 20+ years ago. My answer, "you're out of your mind. It's not going to get better.". Today I have solid state. I have been fighting off the urge to go "Tube" again. Thank you for bringing me back to my senses.