Just got your tracings, thank you very much. Your horse does look like a generous medium or medium wide according to your tracings. (I had told them that my horse's previous owner used a medium-wide Collegiate with him but that I didn't know if that's what he still needed.) I have a couple of thoughts that might work.
HDR pro Senior Event (all Purpose) saddle 17" seat mw tree for $600- This saddle is practically brand new.
Henri de Rivel Pro Sr Event 17″ MW | Trumbull Mountain Tack Shop
"Nice" (this is the brand name) All Purpose 17.5 Wide tree (may need a slightly thicker pad to make this work) $375. This saddle has a fairly generous flap in length so if you have a shortish leg, it may not be suitable for you, but it is a very comfortable saddle at a good price
Nice A/P 17.5″ W | Trumbull Mountain Tack Shop
Personally, I like the Wintecs, especially the older ones. The new ones with the Cair panels have not been as popular and have not worked so well in warmer climates. We have a used 17" Wintec 2000 in really nice shape that does NOT have the changeable tree plate for $250.
Wintec Original 2000 AP 17″ W | Trumbull Mountain Tack Shop
If none of these seem to be a possibility, I have a couple of Keiffer German made saddles that are here on consignment, priced at $750. We may be able to negotiate on the price a bit- These are consignment saddles and one owner is getting anxious to sell.
Kieffer Aachen 17″ M | Trumbull Mountain Tack Shop
Please give me a call if we can help!
I am going to ask for measurements (stirrup bar to bottom of flap) on those saddles. Yes, even the Wintec. I know lots of people dislike them, but until I've sat in one myself I'm not going to dismiss the brand entirely. (However I'm not going to bet the farm on me loving one either.)
I will probably tell her that it doesn't have to be a $500 or under saddle; I can do more if necessary, especially the longer I wait. (I am putting aside a little in the "saddle fund" every month, so the longer I wait the more I can afford.) Also it occurs to me that it'd be a good idea to try to sit in some saddles of those brands she mentioned (if I can find any locally) before I haul off and have them ship me one or more to try.
Anything else you guys can think of that I should do?