We have a similar situation - 3000 feet to our pump house, and we run about 3300 taps from there. There is a 7.5 HP 3 phase vacuum with VFP/phase converter, a 1.5 HP transfer pump and a 1 HP releaser.
In the end we settled on buying a pair of transformers. We stepped up the 240V single phase power at the house up to 600V, ran it through aluminum cables, stepped it down to 240V at the pump house, and then distributed it from there. The transformers were 1000 bucks each, and the cable was much cheaper as it was a much thinner gauge. In the end we ended up paying about 6k for the materials and electrican's time to wire the transformers.
PCFarms - Producer of Maple Syrup and Distributor for H2O and DSD
2019 - 30,300 taps
2020 - 34,000 taps
2021 - 38,000 Maple taps, 1000 birch taps