The hamster cage isn't really the problem. Its the size constraints, your guys are plenty small enough to live in that cage for a while. It's also a humidity thing for species prone to pyramiding. As long as you have a good humid hide, you should be fine with your hermanns.
I spotted this tortoise house which claims to be suitable for hamsters as well and I'm wondering people's opinions on it. The alternatives I'm looking at are a front opening 40 or 50 gallon breeder or bin cage.

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Moving forward, it's essential to keep these visual contexts in mind when discussing Hamster Cages For Adventurous Tortoises.
In just one weekend, you can transform your outdoor space into a tortoise paradise here are 15 outdoor tortoise enclosure ideas grouped by the kind of setup you actually need, from weekend DIY builds to sulcata burrows to cold-climate greenhouses.
These cages are constructed from high-quality materials to ensure durability and safety. The design features superior ventilation and easy access points for effortless maintenance and daily care.