Hi Andy
I once asked a PFI finance manager the same question and was surprised to learn he tended to make up the business plan as he went along.
Being involved since for some time now in public, private healthcare and new NHS schemes, there seems to be no standard templates, I suppose what he meant the plan gets tailored to meet the end.
I have produced financial plans involving building, installation, capital and lifecycle cost, payback analysis and maintenance cost modeling.
What you may need is a maintenance cost model comparison against a schedule of given equipment with the various maintenance options.
In house maintained with OEM support contracts
OEM maintenance and its options
A Managed Equipment Service (MES)
The equipment suppliers can give you all the information you need on the first options, as Geoff correctly surmised, I would be happy to provide a MES solution proposal.
Darren