I am starting my project, building an arcade, I have not a clue about what I do

this will be fun lots of learning, lots of challenges. To make things even more difficult, I am living in Cambodia where it's hard to get a hold on any regular day to day products so all has to be imported by my self. And then we got the second problem, no space, no tools and no way to build the cabinet, I need to find some company here that are willing to do it for me, while I instruct them to give them plans and try to get them to do it all my way! That will be the hardest of all, since most just nod and say yes... and you get something completely different from what you asked for from start.
I will try to document it all, something I have done that I will adhere from start is:
I build a basic computer to run the system on, Pentium i5, 8 MB memory, Windows 10, 1 M2 256 drive for the operating system, 1 4 TB drive for the game system. My machine will be based on LaunchBox and BigBox as soon as it gets into the Arcade cabinet.
I first thought I will try to get hold on plans to build the cabinet, I am no handyman, no designer... but since this is a challenge I challenge my self, have started to learn SketchUp where I start to design a Full-size Arcade, I was planning to use a 27" monitor, but my wife told me I want you to have so it can be 4 players at the same time, so I went for a 32 Inch TV. And now my latest design becomes a 40" LCD Tv since I get to hold on them cheap secondhand here.
Now, as a start, I build this since I love arcade games but also as a way for me to change the family children's behavior. Whenever they do something good, ie good in school, help out home, and so on I will give them tokens, that give them a playtime of 15 minutes per token. I set it up with a timer! I also by doing so can control they don't play too much, too long that is important to me.
So as a beginner, hope some of you talented people out there have great suggestions and great advice, I am always open and truly grateful for any information that might help me on the path to this arcade cabinet and system.
Things I look for are:
Vector-based arcade images that I can use, combine to make a nice fun happy design, I will be using Illustrator to design the graphics.
great tips on how to build, what materials I should use and things I have to think about.