Since things are starting to move on the buy land/sell my house front, I need to start figuring out how much this next step is going to cost.

The plan is to build a barndominium and fund it completely with cash on hand. We have a decent bit saved already, and should clear a decent amount with the sale of our house. Hopefully that will cover everything and we don't need any loans for the house. 

Anyone have experience with barndos? Ideally we'd do radiant heat in the slab and run a couple mini-splits and not need any sort of central air or furnace. We want a 3 bed, 2.5 bath. Nice thing about a barndo is that we wouldn't have to build out the 3rd bedroom or all of the bathrooms to start if we get low on cash.

A few pre-build things I know we have to do: install a septic system, drill a water well, clear/grade the site (I have a buddy that does this), pour the slab. We have one building site picked out that has easy access to existing power lines. Two other spots are a little more remote so they would cost a lot more to hook up to power.

Anything else we need to think about before building?