This is one case where the sky daddy freaks could be useful to stop an extremely dangerously stupid move "forward." Because we live in this world, in this time, if this goes forward, it will 100% be used to extend the lives of the ultra-rich, while the rest of us remain fodder for their machinations.
Meh.
It would undoubtedly be very expensive at first, and therefore only available to the very wealth (probably not ultra-wealthy -- even without automation, caring for such a clone wouldn't be a full-time job, so call it maybe $30k/year -- within the reach of the upper middle class). But competition would drive automation, and we already have most of the techniques required, having developed them to deal with coma patients and the like, but at lower cost because this case would be dealing with a fundamentally healthy body. My guess based on some napkin math is that cost could be driven down as low as $10k per year. Maybe lower.
$10k per year is expensive, sure, but having an immunologically-perfect organ donor could absolutely be worth it for someone making as little as $200k per year.
If the cost could be driven down to $5k per year... then it's in the range where most middle-class Americans could afford it, even if it meant that they'd have to cut back a little somewhere else; maybe drive an older car rather than leasing a new one, or similar.