I know a guy who will draw up a maintenance program for your aircraft based on the manufacturers schedule. He will print off 3 copies, one for you, one for the CAA which he will send to them for approval & keep one for himself.
One of my customers had one drawn up & approved. The cost was about £300 to the author & whatever the CAA cost was. It may not be cost effective in every case but take for example one fairly modern aircraft which we look after. The 50 hour inspection is an oil & filter change, nothing more. If that is what is written in the program then that is all you do, forget about LAMPS.
Another advantage of using a type specific MP is that one can write in all sorts of tasks that can be legally performed by the owner/operator, whether that is a good or bad thing depends on the individual.
The one disadvantage is that you have to follow it to the letter for it to work, e.g. all lifed items & time limited tasks will be written in & must be adhered to. However given the current situation that is what everyone is expected to do anyway.