So let's combine two facts:
First, yours truly, having read everything in sight, is highly sensitive to the recommendation that a first bow should be backed. (I even suspect that, while I build up a little confidence, I will start with a red oak board backed with Sheetrock tape similar to the one in "Backyard Bowyer"). Then on to sinew.
Second, now that you mention sinew, where to get some? Well, the State of Texas has a deer population larger than the human populations of half the states in the Union. So a call to a guy about 40 miles down the road--a guy I don't even know--who runs a wild game processing plant. I drive over, thinking this good old boy will try to have me committed, explain to him what body parts I want and what I will do with them--and come away with about 20 legs. He tells me I can have "...thousands if I want them....". I tell him I want to stay married, so all I will need is about a hundred for this year. (I figure that should keep me warm, hammering and splitting fduring the cold, hard South Texas winter.). So he is sawing off and freezing 100 HIND legs from only big bucks. That should hold me a while.
Now if I can just get the wife to urinate on some Buckskin and chew it, I will be all set for a handle.
Best regards,
Russ