Sounds a bit of a faff on imo but give it a go, what's the worst that could happen!
I tried 2 ways this year, direct sown, and sown into 1" module trays, the direct sown swede were very poor, fair germination (took a while) but a lot went to seed or just didn't swell up. The module grown one's faired much, much better, set away under glass and 100% germination, once they were big enough to go out I hardened them off over a week and simply planted them into their final growing stations.
We had a bumper crop and ended up slicing, dicing, blanching and freezing a fair few pounds.