Start by listening to meupatdoes. Great info and advice.
I’d want to know what greenish 2’6 horses are really selling for in your area. The Pre-green champion for the year in my area sold a couple of years ago for $6500.
Be sure that anything you buy will pass a vet and has a good brain. Don’t pass up a good offer. (A former trainer of mine passed on and offer on a nice gelding who was struggling with one lead change. Swap may have a physical source and a year later had a local reputation as not having a swap.) Try to minimize the time you have the horse. Cash flow is the name of the game in re-selling.
If you are in an area where prices are fairly low, do you have any friends who might help you market a prospect in a more pricey area? (I’m in the Albany NY area and prices are fairly low for local horses. Many local trainers like to try to sell at HITS in Saugerties because our prices look cheap to buyers from Westchester or CT or No. Jersey.)
As mentioned above, be sure that your new employer is on board with your decision to bring on a project. Know up front that there may be the expectation of a commission of some sort because you will be trading on her reputation and barn name and discount in board etc.