If you are worried about battery, consider buying LFP batteries. The CATL LFP battery has an expected life of 1,200,,000 miles. One of CATL business partners selling buses offers a 900,000 mile or 15 year battery warranty The auto industry offers 100,000 mile 8 year battery warranty because they think that is good enough. In my opinion the industry, for LFP batteries old offer 500,000 mile warranty for basically no cost compared to profit from increased sales.