At the end of the day, three unwilling people still adds up to three unwilling people. I have the feeling that your friend can be a difficult person to work with which would make your time together somewhat challenging. I'd say more than her hips and knees incurred damage. I also have the feeling that while you prefer to avoid errands on her behalf, you do not come across as wanting to abandon her. As I am unfamiliar with both the general and wiring layout of her domicile, is an extension cord necessary to reach a table and chair which is comfortable for her? And, does she have the means to print a draft? Much like life, books are a series of interwoven short stories, Perhaps you could arrange to drop in for tea one or two days a week and do a partial typing leaving her to do some. Call and check on her progress for your next visit. I get that nothing may happen on her end which would leave you at Square One. You may have already tried that tact. Unless the story is more like a short poem, chances are the draft is not done in one short session. Does she have the vision and typing skills adequate for the task on her behalf? And, does her computer have software to facilitate writing stories / book which she can easily use? I also appreciate a laptop is less than ideal for long periods of typing. Is she a spiritual person? Does she believe in a higher power? Is she a Christian? Does she believe God will supply all her needs? Could you be part of that plan? Or, is she none of these and is simply looking after No. 1?