Check out Squadron Models for all kinds of detail goodies. https://www.squadron.com/ Great source for highly detailed photo etched metal bits. Voyager is another. Not my photo, but this shows some of the photo etched scales parts they sell look like.
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I used to really be into this when I was younger and thought about it again but they cost too much now with all my other projects. However, a super detailed Stryker is one I'd like to do. One of the original ones without all the shit though. Be cool to do all the variants and line 'em up in a motor pool too.
You know, if you're good at this I bet you could get many military units to bankroll the supplies if you gave 'em the finished product to display, like say in a Bde. headquarters... I mean, I've seen it before. Also I know for a fact some American Legions will pay for it (but good luck finding one flush with cash about now).