Living in a condo my only option is to store my ebike outside on a bike rack. I built the ebike using a CYC Proton motor. If I remove the battery and bring that inside is it okay to leave the ebike outside? This would only be for the winter here in south Flo

I would like to build a bike to use for bow-hunting. I live in an area that has hilly terrain. The hills can be steep and ofter covered in leaves and or mud. I typically ride a side by side but would like something more stealthy. For my bike frame I purchased a Gravity 2025 Bullseye MonsterFIVEFIVE INCH Tires Fit* Fat Bikes, Mountain Bikes. Research show this is a good entry level fat-tire bike with decent components. I would like to equip the bike with a Bafang BBSHD mid drive 1000W motor. In general the bike would be for riding to stand locations. I want to be quite and not get sweaty. So climbing hills without pedaling is important. In general it would be odd or me to make a 5 mile trip when traveling to a stand site. The trips would likely be much shorter. I was looking at the Complete Kit package- Monster Range Commuter 1000w Motor https://www.johnnynerdout.com/product-page/complete-kit-package-monster-range-commuter-1000w-motor-and-48v-24-5ah For the battery I was looking at the 52V 25AH battery. Would this be a good motor and battery for my set up? I plan to upgrade the brakes from mechanical to hydraulic with this kit. JKSPORTS ShimanoOEM BR MT200 Hydraulic Disc Brake Set Front 800mm and Rear 1400mm BR-BL-MT200 Hydraulic Disc Brake Set Front and Rear I thing I would need a 120mm bottom bracket size for this setup? Would I also needs a Luna Eclipse 42T offset chainring: Luna Eclipse ChainRing for the BBSHD ? Is there anything else I would need? Any other recommendations?

I have a Marin aluminium frame mountain bike, would the Bafang BBSO2B motor unit fit this frame ? thanks and how would I determine the new chain wheel offset dimension to ensure a correct chain alignment?