One last thought. I've been very involved in what it means in a small bussiness when someone quotes a long delivery time.
If you ask a small bussiness owner how things are going, he will imply that it's going great. If you ask his wife, she'll probably tell you the truth. Especially if it is not creating much income.
A long delivery time typically has nothing to do with success or failure It's a way to make people think bussiness is booming, even if it's not. Some things that take a long time to make go slowly. Also if someone is doing this part time, and has other work, that slows things down even more. When one gets into the bussiness, you begin to learn details like this. You can see another frame makers inventory and begin to find out why there is a long lead time. After you have made a frame or two, you can estimate how much time another framemaker needs to make a frame. You can estimate the cost to make a frame.
If someone claims a long delivery time, ask them how many frames are on order. If you don't get a straight answer, then you know the answer. Ask as many frame makers as possible now, how many units are on order, you might learn a lot. Do NOT be impressed by long lead times.
You sound like you are being carefull, that's great !!!!