Like how you added the pictures to your post for a visual. 

This is both a visual inspection (exterior, interior, etc) for peeling, flaking, cracked paint. 

Remember as well, that if you don't see the pumping guy digging up all three covers when pumping they did not pump the tank correctly.Updated tanks have internal baffle walls which are present from the manufacturer enabling the solids to be separated from the liquids , meaning if they only pump from the center cover which is most common.1.They don't get all of the water out of the tank.2.They cannot visually inspect the outlet condition.3.They cannot clean the outlet filter. 4.They cannot inspect the inlet condition where the pipe comes in from the house.Hope this post helps you to educate you on septic maintenance and possibly saves you money in the future.

Someone could technically live in it, however it is not visually appealing.

That's when you need to be able to visually inspect and even test some of the parts to identify an issue (like the flame sensor or the ignitor).

I added the picture because its easier to visualize the area when looking at a map.

I'll speak to some mortgage lenders that do both HELOC and Cash out REFI to see if they can give me a better visual on this, the actual numbers.  

If you live in a home or condo why is it that you can pay the mortgage there, but you can not visualize someone paying you a mortgage payment or a payment in general.Nike has a SLOGAN that says DO ITI agree with them until you do it you will not know whether or not real estate investing is for you.

Hi Kiki,I'm an appraiser in NC and typically only a visual inspection is done during the time an appraiser is at the house.

So being able to talk through your successes with the paper trail to demonstrate them can go a long way (include a few graphs or pie charts... a lot of bankers like visuals).