Have done that. You will have to give an easement to the electric company to cross your property, depending where you live, 20,000 to 40,000+ for your septic, the road $ depends if you need drains and how many feet apart is needed for those drains, clearing, more $$$$, and you haven't poured your foundation.

You need to go to your local engineering firm. Do not buy until you investigate what you can do and what it will cost. What is your realtor telling you? She/he has to have some info on the property. This could be a winner for you or a disaster.