Your power company sounds way more helpful than mine! I'm actually in awe of what you just said. I tried for months just to get an answer for what power pole/meter can I needed to set, to get power to my barn. The company I pay for service (TXU) deflected me to the company who manages the power delivery (Centerpoint) who deflected me to a list of authorized consultants they use, most of which would not answer the phone or return calls, and if they did, refused to talk to anyone but a licensed electrician, and expected to be paid to come out and look before giving an answer. I was bounced around between different people on this list until I talked to my neighbor who is a licensed electrician. He tried to get a quick answer for me but it turned into something that was taking so much if his time that I felt we were approaching the boundary between friendly neighbor help and paid work so I told him not to worry about it. I ended up just taking a chance and picking one of the 5 options for power pole/meter cans they had at the hardware store and called them to run power to it. Turns out I picked the right one on the first try. Yay!
I'm not an electrician and this isn't electrical or engineering advice. Just my own thoughts. My barn was about 60ft from a power pole on my property line (different power pole than the one which powers my house), so getting a separate service ran to it was the obvious first choice. But due to the issues I was having getting the power company to confirm the requirements, for a while I was looking to run power to my barn (300ft from the house) from the house panel. To put a 200A panel in the barn would have required several dollars per foot worth of copper large enough not to run into voltage drop problems. One solution I was considering was using step-up/step-down transformers and HV transmission line. It's the same tactic the power company uses to get power to your property. To run a 200A/240V service through a 3kV transformer would reduce the transmission line requirement to 16A. That's a LOT less copper (but more expensive HV wire).
I don't know if you could convince a regular electrical contractor to do this for you, as it's not common, they would have a lot of homework to do, they would lose money on the mark-up of tons of copper they would otherwise be selling you, there might be implications on their insurance, etc. But if you're DIY'ing this whole thing anyway, this might be a way to save thousands of dollars given the lengths you're trying to get power. IF you have any electrical knowledge and access to appropriate safety gear.
First (best) option though of course would be to have the power company run poles and lines all over your property.