Evy,
It all depends on your abilities, but that does not mean it's a negative thing. I'd say 30-35 is a good start, but if your strength is above average, 40-45 might not be bad, but, play it safe and go 30-35. Trying to build muscles while trying to build form does not end well in most cases. If you got a 68" longbow from Mike Ballenger you could have it 30-35 pounds and if form is good, Mike might be able to shorten the bow after you work on form and strength and thereby increase the poundage to a huntable level. Any bowyer might be able to do that with the right limb design and bow design.
Any nearby tradgangers you can work with? I think one has already posted that may be a neighbor not far away.
Again, good luck with your quest.
Bud