Lots of places (theaters, grocery stores) have destination chargers (some are even free). If you go to those once or twice a week, top up there. If you don't drive much, a weekly supercharger visit is fine. Keep in mind that charging is currently worst case. It will improve by ~50% each year.
Battery degradation is not something you should be worried about. It will remain above 85-90% for hundreds of thousands of miles.
Don't forget about depreciation. Gas cars will be worth nothing soon as millions become undesirable. Electric will be so in demand that they'll barely depreciate. Used Model 3s right now are selling for thousands more than a new one.