Remote pump house power supply 220v and 120v
the "I own a copper mine" version

If you own a copper mine, wire cost is no object. Sell your copper at market and buy aluminum.  Assuming we're running just the lump at 10A, and aim to confine voltage drop to the stock-advice 3%,  we will need 3/3/3/6 aluminum cable.   

If you also want to run an honest 20A of loads in total, we will need 2/0-2/0-2/0-1 cable ($3000). 

If you want a full 30A still at 3% voltage drop, you'll need 4/0-4/0-4/0-2/0 cable ($5000) .

We need neutral because you have 120V stuff to run that apparently you cannot source in 240V for some reason. 

We need ground because using a ground rod instead does not provide fault current protection.  You also need a ground rod.  

You will need a disconnect at rhis location .  This is as easy as using a subpanel which has a main breaker. Size does not matter as long as it is>= the supply breaker.  Remember it must also have separate ground and neutral bars. 

The stock advice, no-brainer version

See "I own a copper mine" .

The "I do not own a copper mine" version

in which cost is considered worthy of attention.  Ok, 2.4 KW for the pump, somewhat less for heat and light, say we can get this done in 5 KW.  5 KVA transformers are often seen on Craigslist for $100ish, we need two. Probably 480V transformers, if possible get 600V, popular in Canada.  

The transformers will be used back to back, to step up transmission voltage, reducing voltage drop dramatically. At the far end, it will give 120/240 split-phase.

Amps will be 10.42@480V or 8.3@600V. We are going for 6% voltage drop at max power since draw will usually be half that (and thus 1/4 the drop).

Either way, #8 Al will suffice or #10 Cu ($500).  We only need 2 wires. 

Why no neutral? We will be manufacturing neutral locally. Why no ground? Irrelevant since the transformers double isolate the service.  

Since our final output transformer has no earth ground reference, we must provide one with a local ground rod.  All this would make this a main service in need of a main breaker, and as a main service, neutral would be tied to ground here.  The technical term is "separately derived service" .