What the OP ultimately pays or how high the budget is, we do not know. Just because someone is willing to spend more on a house than others does not mean they live extravagantly. And even if they do, it is their personal freedom. I find the comment rather strange and tinged with envy.
With a normal heat/ground source pump, you cannot heat the property with a pool. You need larger devices that are correspondingly expensive. Not to mention whether drilling would even be permitted... Normally, one relies on a gas boiler or, for large facilities like hotels or swimming pools, on combined heat and power plants.