I love your analogy! I'm also running a unprofitable business that costs me money each month (G Suite, hosting, domain registration, SES, Wordpress plugin one time cost etc). I have 2 customers (one is a friend, another is a true customer). The true customer signed up knowing the cost and has told me I'm charging too little but with only a single customer, I can't bring myself to charge them. I feel like if I go that route it becomes a bit more of a business and I open myself up to other issues. I also don't have time to work on gaining more customers now (I work in COVID response, so it's been a busy 11 months). So I'm stuck just paying out of pocket.