BUT, I now have a couple ground floor units on concrete slab, and I want no chance of wood warp.

Happy to help with more concrete answers if you can share more concrete details, just let me know!

If required, Window wells and cutting concrete are expensive ($5,000 per is a good estimate-power, water, and sewer are convenient-exterior entrance

Chris Clothier can pee his name into concrete. hahaForget about Chuck NorrisChris built the hospital he was born in heheChris doesn't sell turnkey, investors beg him to buy 😁When Chris goes to sleep and switches of the light, he is under the covers before the room goes dark.Chris is like Muhammad Ali, he tussled with an alligator, wrestled with a whale, handcuffed lighting and threw thunder in jail.Murdered a rock, injured a brick, he is so good at turnkey it makes medicine sick heheheOk, I'll stop now hahaha Chris shot Tupac

Finally someone who hits every point with concrete points and straight to the heart!!

So before I have concrete poured, I am wanting suggestions from more experienced landlords who have worked through these issues.

Good luckThat's a lot of concrete value, right there, Dan.

I'm exploring hard money now, but do not have a concrete answer as to how hard it is to get.

Or King's Concrete never showed for estimate.6. 

They completed a 2-day job digging into a concrete wall, replacing plumbing, and patching for $1,000 just a few months earlier for our property manager.