Don't worry care can be provided by slaves with limbs or robots don't let that keep you from this fantasy. Some of course like the fantasy of caring for a girl like this.
The Ultimate Bondage never to escape. Totally helpless needing everything done for them. No stump to attach artificial limb to. Broken minds repaired with electro shock and drugs. Holes tightened both by force excersise and surgery. No scars from removal due to future medical techniques or the scars reduced by plastic surgery to not worth drawing.
Death is escape thus never kill them.....unless you can bring them back alive. Mental Break Down is an escape might be fun to break them but even more fun to unbreak them to realize there situation will never change.