I have basement waterproofers, HVAC, tree removal and a garage builder coming to take a look this week. 1.

Here's a photo from a duplex I had built by a full-time builder several years ago.Note: with brick in my area the order of install is reversed. 

Want to estimate the cost also for the builder pro refer?

The other is more like a traditional GC, who works with a local builder/developer. 

The only time this may be a real issue is if the builder or developer was unaware of a sinkhole infill area at the time your property was constructed.With that said, I live in a higher risk area for earthquakes and don’t see much financial sense in the earthquake policies that are offered right now.

I love using Charm Builders out of Ohio for roofing.

That also applies for your builders risk insurance policy if you are rehabbing and it is vacant. 

You cannot halfway be a licensed realtor or builder.

84 Lumber as mentioned above, Builders First Source, and BMC supply are all good contacts in the Columbia area.

I can also recommend some builders, shoot me a DM and ill send you my contact info.