Personally I made sure I upgraded the modern mansions first. Biggest bang for your buck when fully upgraded and tbh the last 2 stages aren't really resource heavy. Nice chunk of change there.
Get all the base buildings built, you can store em after they are built and you still get the Rev for the base value.
If you have an excess of 1 resource, see which building upgrade can use that one, get it out of storage, upgrade it, then store it again.
I do have multiples of every building type in me SH, so I can upgrade when I get an excess of resources
