We have lifeline systems in all our flats, and we use them for welfare checks on those residents who want/require them. It is for trustees to decide how to direct the funds available to the charity and the targeted approach – i.e. to those most in need of a service is certainly sensible, particularly where funds are limited. It does mean that each new resident will need assessment for the equipment rather than it already being in place though.
Importantly for us, we have our smoke detection system linked into the lifeline system, so that is a reassurance that a fire (or false alarm) will be dealt with by the alarm receiving centre.