Tundra wetlands on the planet-moon Homestead

Homestead is not only a science-fantasy setting for some of my fiction. It is also a thought experiment in both astrophysics and exobiology.

Basic parameters for Homestead (to 3 place accuracy):

1. Mean surface gravity: matches Venus (0.904 g)
2. Mean density: matches Mars
3. Mass (if I've done the math right): ~1.72 times Earth.
4. Orbits a brown dwarf, Isabel (mass: 59.0 times Jupiter)
5. Has 2 moons that cyclically attempt to share the same orbit. Every 5 years they take turns chasing each other.
6. Isabel orbits 2, tidally locked stars (each 0.6 to 0.9 times the mass of Sol, our sun. Total solar mass: 1.20 to 1.80 times Sol.)
7. Isabel has a powerful, chaotic, and swiftly rotating magnetic field, plus it is a potent radio wave emitter. These factors extremely impact Homestead's biosphere both directly and indirectly -- including plant life.