Regarding the question of airbnb and loneliness... my widowed sister offers two single rooms via airbnb with a large shared bathroom. She has a knack of making them look very gorgeous and welcoming, and in fact usually only rents one at a time. She has 5 star reviews, provides little extras, like bottled water, tissues, local maps and lists of eateries and attractions, and she often runs them around in her car, including to the airport if they have not arrived as self-drive tourists. She provides breakfast.
She has a good lock on her bedroom door for the night time, and her own room, with dressing room and bathroom ensuite, opens via french doors onto a patio with an exit. She only accepts people with good reviews, never allows second visits if she hasn't felt comfortable - and she makes both a good income (her rooms are not cheap) and friends.
So it can be reasonably safe, a source of company, and a convenient source of income.