Super Complex Computer Upgrade, Need Help PLZ

[Rkraiem100]

Im in the middle of a really complex computer system upgrade and i need some help. TBH im not even sure if some of the things i want to do are even possible so i was hoping u guys could help. Incase ur wondering yes this is not my 1st time building a computer and yes i know what im doing. Please answer as many questions as u could, thanks

1- im trying to set up a multi-computer setup to make things a bit easier for me. my pc is my main gaming platform but at the same time i make youtube videos and sony vegas is a resource hog. to make things easier im building a 2nd computer to offload the rendering from my main rig so i could play games while a 2nd computer is rendering everything. since im getting a new case anyways are there any good cases on the market that could easily fit 2 separate mini atx boards... im talking something that is designed to fit multiple computers inside or that i could easily modify it to do that (price limit is $100 btw)

2- the 2nd computer im building is going to be a piece of garbage, im cheaping out on it as much as i possibly can to save $ but i need it to be able to run sony vegas. would a intel pentium g3240, a nvidia gt640, and 4 gigs of ram be enough. also i need a cheap used lga1150 mini atx motherboard for under $20 where could i find that

3- on a side note i have a old laptop and i might wanna do some... well lets just say interesting modifications to it. it is a toshiba satellite E205 laptop. the thing works but a good amount of the hardware is damaged (cracked screen, broken usb port, no battery, etc.). i know that laptops are a lot different than desktops in terms of the supported parts but the thing is half broken anyways. i was thinking, would there be any possible way for me to hook up my nvidia gtx 960 to it, i dont care if i have to rip off the exterior of the computer i just wanna impress myself and my friends by hooking up a gtx 960 to a laptop (it already has a nvidia geforce 310m idk if that matters)

4- i have around 14 hard drives literally just lying around collecting dust (im not exadurating btw). they are mostly old slow junky relics but they work, i wanna hook them all up to my 2 computers at the same time just for lols. i have more than enough sata cables and i have like 6 power supplies so worst case scenario i could hook up multiple power supplies to this monster but is there any conceivable way to hook them all up to both computers... i was thinking maybe i could do it by building a small server but then i realized that i have no idea how to do that and im not even sure if i could do something like that with a server

5- i wanna hook all of this up to 1 monitor (lol ur probably thinking im crazy by this point)... so im talking hooking up at least 2 computers, a server, and possibly more all up to 1 monitor and have some kind of switch to switch between them. also the monitor only supports 1 vga input so im not sure how that would work

6- lastly would there be a way to add the power of my laptops cpu to my main rig... if its possible for desktops i could probably figure it out for my laptop but is there any way to essentially create a multi-cpu computer without having to spend too much $

thanks again

[xQubeZx]

Well, you can't use the laptops CPU..Its not even designed for multi CPU use. Then about the second rig. I really don't see the point of a weak rendering machine since that CPU will take ages to render anything.  Also 4gb of ram is not really enough for rendering in vegas either. You will mostly have more troubles with crashings and stuff like that.