I think the main reason people are suggesting non-WB is the profit factor.
If one has $25K and spends $5K on the horse, $1K on PPE and usual vetting, $12K on board and farrier for 7-9 months and $5K-7K on showing they have to recover $25K.
If one blows the entire 25K on the horse, they still have the other costs and have to recover $45K as a break even.
Given that OP wants to actually make some $ on her project, and given that the commission will likely be 20% of sale price no matter what, selling the ‘off’ horse that does the job, is attractive and has a stellar temperament for $40-50K will net her more ROI than selling the WB for $70-80K
It depends how much money she wants to have at risk and how strong her market is for the level of horse she can develop; and how well she can judge horses in the rough.
Rox Dene was out of a TB mare, her sire by a Selle Francais and her sire’s dam was by a TB stallion…the only Dutch in her pedigree was her sire’s great granddam…but that is what she is registered as.
If you are looking for the project, the likelihood of finding the ‘one’ at a bargain price is actually higher with people who do not value Hunter qualities you are looking for.
After all, there are few breeders of WB hunters. Most are jumper or dressage breeding that got pointed in a different direction…