We need to add stairs to all outside entry doors, completely gut the bathrooms & finish some other rooms including adding a bathroom but Bldg.

Can this "help" sit on the shelf for 6 months or a year.My gut tells me the GC is either trying to take you for a ride or he's hustling to make a deal without giving proper thought to what you need or how it will be delivered.Lastly, have you talked to any other local developers?

Anything that you have found productive or telling through the screening other than just a gut feeling? 

I have a basement to gut and remodel .

The house will need to be completely gutted, doesn't even have CAC (we live in GA so will need that), needs completely new electrical, taking down walls, rearranging of bedrooms, replace windows and doors, enclosing the carport to a garage, it needs a ton of work.  

You can figure it out.I commend you though for wanting to jump back in and having the guts to find a property.But, if you want an answer - here it is: HUSTLE.

Major kitchen renovation - took down 2 walls and completely changed the layout/opened it to other areasMaster bathroom - enlarged shower and complete gut, changed location of toilet to add space in master bath2nd bathroom - new floor, cabinet, fixtures, refinished wall tile for new looklaundry room - finished the walls and added floor tilePaint inside and outNew trim and door hardwareWhat was the outcome?

I'd say follow your gut on this.  

These people are going to BE your investment, so make sure you gut-check your decision.

And trust your gut with these things.