Setting up a 65 cm ÅKERBÄR for Alocasia; lights, fan, moss?

Hi all, I'm buying the ÅKERBÄR 65 cm (65 x 40 x 22 cm) and want to set it up right the first time. I'm in Belgium, so EU shops and plugs.

What goes in:
- Alocasia cuttings and corms (Venom, Stingray) in sphagnum and pon
- small pups in 6–9 cm pots
- new plants in quarantine for a few weeks

My bigger plants live in a separate vitrine with grow lights. This one is only for the small stuff. It will stand indoors near glass block windows, so not much natural light.

Questions:

1. Light: what do you use in the 65 cm? LED bar inside under the roof, or on top of the roof outside? How much light does the roof block? Any bar that fits well? Anyone tried a ready-made kit?

2. Fan: small USB fan running 24/7? What size, and where do you put it? Or is leaving the door slightly open enough?

3. Bottom: what do you put in the base? Tray, leca, sphagnum, live moss? Does the steel base rust over time?

4. Humidity: how high does it stay with the door closed? Problems with condensation or mould?

5. Cables: through the gap at the door, or did you drill?

6. Anything you'd do differently if you started again?

Thanks, I'll post photos when it's set up.