If you have specific questions, I would contact your state USDA field office. 

Electromagnetic Fields (EMF) are given  off  by electrical  devices.

Just type in the street address in the search field and once the map shows up click the "info" tab on the left to see details including the code enforcement cases.

I have over 15 year experience in the maintenance field and 7 years as maintenance supervisor.

It needs a drain field in the back building and there is no room for one.

Side-note: the parents passed away well over a decade ago and there was no will.I'm not an expert in this field, but this does not seem right.

Research both sides of the field.

I was wondering if I can be a student to someone who is in the real estate field and that doesn’t mind teaching me the ropes along the way

Not meaning to offend anyone, but from what I understand this is an unregulated field and anyone that is considered "Qualified" is someone simply  that hasn't been disqualified.   

KDP Septic based in Phillipsburg is excellent, they put in a complicated 50K system for us in East Amwell Township in the dead of winter this year (high water table on property so needed pump up leech field system, ground was frozen, they have all the heavy equipment needed for something like this).