First build, so I appreciate all the help. I use AutoCAD, CS Studio, Intellibuild, Mitek Sapphire, and basic office type programs. The software you don't recognize is engineered lumber, wall panel, and/or truss design software. Think parametric modelling. I have Windows 10 Pro 64, 3 24" monitors, keyboard, and mouse. I also have a NAS with 4 4TB drives in RAID 10 for my files. I often have a few things running at the same time so RAM is important. I don't play games, but I might in the future. Budget is $3000 USD, but I'd go $4000 if it made a big difference.
EDIT: I put this together. Part List The Quadro P4000 was not a choice so I selected the P5000. Knock $1100 off and I can get the P4000 from Amazon.
EDIT: I put this together. Part List The Quadro P4000 was not a choice so I selected the P5000. Knock $1100 off and I can get the P4000 from Amazon.