Also keeping the miner inside and only the antenna outside, the cable between the miner and antenna has to be really short, otherwise i lose signal and i lose reward amount.
How about weather proofing the miner so that you can keep it close to the antenna since the cable is short?I believe the antenna is weather proof... Right?
https://panther.global/download/user_manual_en.pdf
This subreddit might be a good place for you since there is a large group of guys operating Helium miners there - https://www.reddit.com/r/HeliumNetwork/
Someone posted about how he weather proofed his miner - https://www.reddit.com/r/HeliumNetwork/comments/qyhkgg/second_post_second_set_up_weather_proof_and/