I think part of the reason that you find places with strict requirements is because issues have been run into already. It is kind of like a silly warning on the back of things you purchase at the store. You know the company put it on there because somebody has done it!
This shouldn't detract you from trying to tackle the
project yourself but perhaps make you consider the importance of the steps that go into a functioning septic system.
I think first steps are to look at where you would want to place the septic system on your homestead. You really want to consider where your
water is being pulled in from and how to place the system to minimize disturbances to not only your homestead plan but also to minimize the potential of a contamination event. I think the following step after you figure out where you want to place the system is to get a percolation test done to consider the feasibility of what system will work for you.
I always like to build above minimum specs if it will still function as I intend.
Do you have an idea of where you want to place the system yet?