How big is your concrete pad? I could come over and give you a price. I suggest paying to have it removed as it’s hard work and won’t cost much. Save the money you can get through the RiverSmart homes program for pervious pavers etc. They should give you $1,200 towards them (they aren’t cheap). I don’t know if you need to have PoP connect us or how that would work. Let me know if you’re interested, I live in Columbia Heights.