I know it is hard to say.... looking for "average" answers here...

I have a baby female red tail boa. I plan to keep her FOREVER. She will not be bred.. just fed weekly for the next 40 years.

Question is, assuming she eventually reaches these lengths, what would you say the average weight would be in LBS?

4 feet?
6 feet?
8 feet?
10 feet?

Thanks. Again, I know every snake is different. just looknig for ball park figures.