I had a cherry tomato plant that I just loved so I saved the seed four years ago and have been sprouting them indoors for the third year now. I have one of those plastic "boxes" with a clear cover and use those tabs that grow when wet. Once it's warm outside (I'm in 5a) I put them on the deck in the sun and bring them in at night. Eventually I put them in larger pots until I can put them in the garden. I've had good luck with the cherries, haven't tried large tomatoes. They need a lot of sun and may get leggy, but I would think since you bury most of the stem anyway that shouldn't hurt. (I do move them around the house to follow the sun LOL)
