Dell Inspiron 3650 to DisplayPort

Just as a follow up to the above - in work I have an
Dell Latitude 5480
https://www.dell.com/support/home/ng/en/ngbsdt1/product-support/product/latitude-14-5480-laptop/overview
connected to a
Dell Universal Dock - D6000
https://www.dell.com/en-us/shop/dell-universal-dock-d6000/apd/452-bcyt/pc-accessories

And I'm debating buying a Dell Universal Dock - D6000 for home.
My question is, could I connect the the Dock to the Dell Inspiron 3650 desktop? (via the USB3 port on the front of the desktop)
Or are the docks only for laptops?

Hi Speedstep.

Many thanks for the reply, that's a fantastic amount of information and it is appreciated.

I'm afraid that's all out of my price range, and I'm not 100% confident upgrading power supplies... I'm just after dual DisplayPort connection (So as to free up the DVI-D ports on my monitors for a 2nd desktop) and I'm not fussed on the resolution, so long as it doesn't drop below the 1290 x 1080 current settings I get with DVI-D.

Would there be a mid level graphics card with 2x DisplayPort (preferably that will run with my current desktop set-up) that you would recommend?
The most this PC will be doing is Adobe Photoshop work - nothing too extreme.

tell why needing 2 screens, what modes do you plan to use with 2 screens.???? 

now we know its not for 4k or gaming.

all we know now is photoshop, use.

in most cases any 2 port DP card will work  if it fits (phonically, LxWx H. )

and not gaming , you don't need some $300 GPU card, and that opens the door to vast cards, with 2x DP.

that tilt open case I see has lots of room for just about any card,  see that yet?

and at best you have the 240watt PSU, so any below 75watt card will work (vast cards exist like that and USED near endless choices)

even mighty $10 cards sold in ebay used,  why not buy one plug it in and end the worry.

even my 790 has K2000 card (call it business grade, no gaming but is not junk and sold with vast DELLs new)

https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=video+card++k2000&_sacat=0&LH_TitleDesc=0&_osacat=0&_odkw=video+card+2x+DP

when you get here, (seen on wiki) what you set here, may affect what  applications work right or not.

You can do Dual display port with what you have but again its expensive hardware.  Creates a stretched desktop with a maximum resolution of 5760x1080 (3x 1920x1080) across three displays or 3840x1200 (2x1920x1200) across two 

https://www.matrox.com/graphics/en/products/gxm/th2go/displayport/

Thank you both. I'm going to look at getting a NVIDIA graphics card with 2x DisplayPort out.
Appreciate the replies and advice.