1) What is the power supply on this unit?
I may want to add a GTX 1030 later on if the integrated HD 630 is not sufficient
2) Is the storage SSD also NVME. I know it is PCIe and M.2, but that does not necessarily mean NVME.
3) Is the RAM easily upgradeable to 32GB.
4) If I upgrade RAM or add a video card, will I have to get a new Power Supply?
These have been shipping with 240W power supplies - bear in mind they're small and use a proprietary 6- or 8-pin connector to the mainboard - you'll be very limited in upgrading later and will need a third-party adapter cable to connect a standard power supply.
PCIe and NVMe are synonymous.
It looks like 16G is the max.
Since you're already looking forward to upgrades - the XPS system might be a better starting point. The very small case the Inspirons come in limits things as far as future-proofing.
There is a card that would work.
Model R5 240
DELL P/N 0C48KP
DirectX® 11.2, Mantle, OpenGL 4.3
PCI EXPRESS® VERSION4
AMD POWERTUNE TECHNOLOGY2
4K RESOLUTION SUPPORT8
HDMI (WITH 4K, STEREO 3D, DEEP COLOR & X.V.COLOR™)
AMD TRUEAUDIO TECHNOLOGY9
AMD EYEFINITY (MAXIMUM DISPLAYS)
VIDEO CODEC ENGINE (VCE) (WITH H.264, MPEG-4 ASP, MPEG-2, VC-1 & BLU-RAY 3D)
GPU CLOCK SPEED
Up to 780MHz
Up to 2GB DDR3
STREAM PROCESSING UNITS
Up to 384
An Older card would be Dell 8K5F6 Full Height AMD Radeon HD 7470
160 shaders DDR3