Love the 'maters, too.
I have a raised bed of 4 rows high of cinder blocks. I put 2" PVC pipes about every 2-3 feet around the perimeter down through the holes in the blocks and reaching about 4-5' high. Then I poured Quickcrete in the holes.
Used 45* angle PVC joints at the top with other 4 way & T fittings for cross beams of PVC pipes.
Now have 2 layers of 6 mil plastic sheeting over all that. As a quick and dirty way of securing the sheeting which drapes almost to the ground over the cinder blocks, I nailed concrete nails near the bottom blocks and then put small round rocks tied with twine higher up in the sheeting and secured in that tying one end of a bungee cord a bit shorter than the length to respective nails.
Then I put a small space heater inside with a thermostat.
The tomatoes are doing fine. Still blooming and the blooms appear to still be setting.
And they still taste great.
Ahhhh,
with another 45* angled joint at the top of the rafters.
There are cross beams under the rafters that I layed the 6 mil plastic across, too.
Haven't yet, but plan to put the blue rigid foam insulation (available here at Lowes but not Home Depot) on the north side inside the plastic between the uprights.
Quix, you are my kind a person, lol. You understand tomato addiction, and will do what is necessary to maintain your supply. This 'mater talk, here at "turkey time", has me craving a freshed sliced tomato on fresh whole wheat bread, generously spread with real mayonnaise, salted and peppered to perfection. A perfect breakfast....or snack....or anytime, feast.
Have a great day. :>)
pattyjo