No its just you could overrun a linear psu.A switch mode will disconnect on the same overload. However the losses on a linear are huge. id estimate a new psu on an average system will save over 80 quid a year. That was before the current prices for electric.
Id say its worth replacing linear psu for switch mode now more than ever.
Logan just dont tell your parents how much electric your old gear hobby is costing them.
Depends on your current level / knowledge.
One way of starting is to post questions but keep a question to a single thread, ie dont ask loads of questions in one thread it gets unmanageable and makes people less likly to reply
As above do you enter your property as a user or do you break in.
Depends on your detection the 9xxx is an old range so guessing your detectors are too.
Plus with that panel you won't have many.
Maybe rephrase the issue you have?