|>>It really is unbelievable, I see this in almost every forum. Someone sets out in their question what they would like to achieve and instead of offering advice how to do it people just tell them why that is not what they want to do.<<|
This is because inexperienced people sometimes don't ask good questions. Or they ask how to do something that the more experienced users know is a waste of time.
Let's say you wanted to change the oil in your car. You don't know anything about cars, but you know the oil goes somewhere in the engine, so you decide to remove the engine to figure out where to put the oil. And you post a question on a car mechanics forum asking how to remove an engine. The more experienced users know that you don't have to remove the engine to change the oil, and they post telling you to go about it differently. Removing the engine is a big waste of time and money, and there are better ways to accomplish your goal. Would you rather have people give you exactly what you think you need? Or would you rather benefit from the experience and expertise of others, and accept suggestions about a better way to do what you're trying to accomplish?
So...in your case, you're asking how to do something admittedly complicated. Others are telling you that the way you intend to go about it isn't the best way at all. In fact, it's a waste of time and money.
You say to please believe you, that this is the setup you need, but then you also say that you are inexperienced. So how do you know this is what you need, and why aren't you willing to listen to anyone's advice to the contrary? The Internet isn't a magical black box where you put in a quarter and out comes exactly what you think you want.
That being said, "your" way is actually pretty simple. Install two NICs in the PC, configure each to talk on the network it's connected to, replace "router 2" with a switch, and that's pretty much it.