Might find a $100 bow at a yard sale. I wouldn' t hold your breath tho. As for draw length, try the wingspan method. Stand facing a wall with the very tip of your fingers just touching a corner. Have an assistant place a mark where your other finger tip ends. Go ahead and stretch it on out there. Measure the distance from the corner to tip or tip to tip. Subtract 15" from this measurement and divide that total by 2.
Example- 73" reach minus 15" s = 58" . Divided by 2 = 29" draw.
Should get you close.