Andalon de Lebeda:
I am looking at the progression of religious buildings.
eg. Shrine (600gp) -> Chapel (1600gp) -> Temple (4900gp) -> Minster (8700gp) -> Cathedral (13700gp)
Presumably there would be similar progressions in other types of infrastructure.
Can you start at the smallest one and progressively develop it? Is the cost to upgrade from one to the next just the difference in costs or is there some penalty involved?
I suppose if we are using build points (1BP = 1000gp) and lose the loose change each time that would be the penalty for progressive upgrading.
Spot on. You can progressively build in a sensible chain, such as the one you described. And the penalty is the loose change you donate to help run the town/ city - although some upgrades don't incur much of a loss.
Nothing to shrine. Costs 1bp -
Contribution to general city development = 400
Shrine to Chapel. Costs 1 bp -
Contribution to general city development = 0
Chapel to Temple. Cost 4bp -
Contribution to general city development = 700
Andalon de Lebeda:
Can a character chip in some cash to make up the difference instead of only using build points? eg. If he had it, could Andalon use 1BP and 600gp to build a chapel?
Not at the moment - Although the building 'value' is in measured in GP there is no direct corelation. One BP is nominally worth somewhere between 4000 and 6000gp and represents a mixture of all sorts of things.
Once things are settled in and we have worked the wrinkles out of the system - we can look at it again.