i would go down the route of using a whippet stud mate - by the time you have located suitable litters, gone to see the breeders, sire dam, made sure they are doing the work you require, then raising the pup, kennel space, food, vet bills and as someone just said a few seasons down the line it may still end up sh!te and you are back to square 1.
its a lot less hassle finding a stud dog and then taking your bitch to have her lined.