One workaround for undersized transformers would be installing primary metering {at the street distribution voltage) and then feed whatever sized transformers you want. At >10∙ft², it might be similar to a school, hostspal or office.
And, you could have one or more 480V transformers for mechanical equipment, and one or two at 208V for lighting and convenience outlets. {In this area, you also get a 2½% discount for buying power at distribution voltage.}
