Lucy the warmblood?

I have been quietly musing over the idea of getting Lucy approved through one or more warmblood registries as a broodmare for a while now. I don't personally plan on breeding her anytime soon, but in my completely unbiased (haha) opinion, I do think she's a nice enough mare that if I ever had to sell her, she possesses qualities that a prospective buyer might want to pass on to a foal.

If Lucy ends up being very successful and I magically come into a vast amount of money, I may consider breeding her myself but that would be a long way off.

Lucy is a fully registered Thoroughbred but when I bought her, she came with only a copy of her Jockey Club papers. This was to prevent anyone from racing her again, since you have to have the original papers to race a Thoroughbred. All of the registries I looked into require an original copy of the horses papers, so I either need to figure out who has her papers or request a duplicate copy from the Jockey Club, which would cost $150.

Then there's the question of which warmblood registry to pick. I looked specifically at Zweibrücker (Rheinland Pfalz-saar/RPSI), Trakehner, Hanoverian, and Holsteiner. Each registry has different requirements, studbooks, and fees, but in general they are all looking for a horse with a suitable type, three swinging and powerful gaits, and excellent conformation. Fees range from $150 to upwards of $600 depending on the registry. I'd also probably need to pay a handler to show her since I have approximately zero experience in this area. I don't know how much that would cost but I'm guessing somewhere between quite a lot of money and an absurd amount of money, as these things tend to go.

Does anyone have experience with this type of thing? Any wisdom (which registry to pick, details on hiring a handler, etc) would be awesome.