I'd recommend a full draft. I have a full Percheron. But that's my personal style. I love them. But you want to make a careful choice and you want to get one that is fully trained if you are new to horses.
New to horses and new to draft horses is not a good combination. They are bigger and more to handle. Don't fall for the gentle giant garbage. Gentle giants are made not born. It takes a lot of work and a lot of patience to get a good solid foundation on them but they are beyond measure when you do.
So I hope you'd reconsider and think about getting a broke one.
I paid $2800 for mine after she dropped the price from $3800. I've seen some for far lower and far higher.
They don't eat any more than a regular horse. If you got into pulling that might be a different story but for just regular riding they eat the same as most light horses.
Some drafts are really saucy and some are laid back. Mine is a combination of both, just depends on his mood. Dumb wouldn't be a word you'll associate with them! They are amazingly smart but sometimes stubborn.
Special needs? A few. You need to make sure you can find a farrier, most don't want to work on them. Bigger tack (easier to find now that so many people are riding drafts), bigger horse trailer, stronger fencing. Some different diet needs. Many owners follow the high fat diet recommended by Dr. Beth Valentine.
You should get her book Draft Horses an Owner's Manual. Can get it on Amazon.com. It is THE bible for draft horse owners.
If you can find someone in your area that has drafts, spend some time around them. Get to know the different breeds. I have always favored the Percherons over the Clydes, Shires and Belgians. I think they each have their special thing... something that might catch your eye.
But I caution, again, it's not a good idea to start out with an untrained draft horse if you have little horse experience. Best of luck on your search.