And get a sewer line scope - if the house is newer and you have proof that it has PVC pipes, you might be able to skip this but to be cautious always get a  scope.

Yes, it will be exhausting, you will learn a lot, Youtube will be your best friend but don't give up.

Moving the lockbox to a less visible place like gas pipes, garage door, etc. 

To repair the pipe it is pretty easy - dig, cut out the pipe, and replace it.

After moving out, we re-stained the front porch posts with a darker stain (photo is pre-stain), replaced the front door, did touch-up painting on walls and trim, installed new keyed-alike locks on front/back door, and installed a vented bathroom exhaust fan that wasn't there prior. 

I was looking at pipe farms  IE completed subdivisions in Henry county for 1k per lot.. thats 1k per lot  100 lot project for 100k heck it cost 30k a lot just to do the improvements..

If you’re chasing ski resorts for some kind of cashflow pipe dream you’re in the wrong state.

There are options to line the pipe.

There appeared to be a cracked and collapsed pipe around 35 feet.

Same for a collapsed sewer pipe - they won't pay for the repair to the pipe, but they do need to pay for the damages caused to access that pipe like removing flooring, drywall, concrete, etc.