Defibrillators I have been involved in the installation of two automatic defib units, one in our small village and one at a local retirement home. Both are mounrted externally and consequently need a mains electricity supply to maintain a 10w heater element that minimises the risk of condensation inside the cabinet. A dry tower with no damp problem may not need this. The units cost £1200- £1500 each.
The units need to be serviced after each usage - check batteries, adhesive pads etc. You need to establish a maintenance routine checking the batteries every few months.
Training was absolutely not a problem. our County Fire Service provided free hour-long training sessions with every installation. Don't be deterred - go for it! It may be worth inviting representatives of your Dean & Chapter to try legging it from the ringing room down those 200 steps and back again - and please ensure that they bring the defib up with them - they'll need it!