u/Universityofrain88

I have 50 or 60 cactus and succulent plants in 10 to 14 inch pots that I inherited. They are fine staying cool all winter, they dont need anything above 45 or 50 degrees, but definitely nothing below 38. I'm overwhelmed with greenhouse and heating options.

If you had to design or buy or build a structure and a heating system for this need, what would you do?

What would be easiest?

What would be cheapest?

I'm open to all ideas as I would start this project in September or October this year so I have time to learn and plan. Thank you so much.