I think she is cute as a button! I LOVE drafty horses! (i have to say, the chair in her pen made me laugh too.. lol) I don't know too terribly much about draft conformation or anything like that, so on that aspect, im of no help!
But, a recommendation I DO have...
Since you're doing time payments on this horse, you will definitely want to get some sort of bill of sale/lien/whatever on her. I've seen far too many people get ripped off because there was no documentation of the payments being recieved. A cheap solution to this will be to ONLY pay the owner with Checks. That way, you can retain the carbon copy of the check, and there will be a bank record saying the check has been cleared/cashed.
The other side of this, is.. what happens if you make the first 3 payments and she suddenly colics. Who has power of vet? Who pays for it? What if she dies? Do you get your money back? Will she be staying with you or the original owner?
Just something to think about! =)