Growing indoors with greater success?

Thanks, tmtt. I'll take it as a sign that I've spent my afternoon searching for plans to build those hinged row covers.

Between the advice to steer clear of the cheap tunnels and this video, I'm going to try to get some of these small structures sorted for this year and choose the varieties next suited to my eventual setup out of the million seeds I have from this forum. I'll keep those new varieties in mind for next year when I could be excused for buying a couple of packs of seed...