Rather than having to disconnect a bunch of panels until you get to the damaged one.I'm new to rehab / construction, so wondering how this is really dealt with in the real world.

Not that you have to run separate meters, but each side will need access to their respective panel, or a joint one that is labeled clearly.

This single family house has leased solar panels.

Old electrical panels can be difficult to get circuit breakers or fuses for. 

Are there any investors who have put solar panels on your house's roofs and found a way to make a return on the investment?

Panels are projected to last about 10-15.

Do I include the solar panels payment on the rent or shall I just have the tenant pay it as a utility?

For the exterior light, if you do not want to rewire the fixture to the correct panel (which is certainly doable but likely more expensive), you can install a light with a built in Motion Sensor which is either solar powered like this one for $22  https://www.amazon.com/dp/B07926JKCP/?

We are looking to remodel our home to resell and we are stuck on what to do with the floor for maximum home value improvement.Our one bed/one bath home has hardwood in the living room and bedroom, however, there are different styles of vinyl wood panel in the kitchen and bathroom.

A perfect example was when the health care bill was first released -- Conservatives had LOTS of great arguments on why it was a bad bill (again, I completely agree), yet before they could really coalesce those arguments into a logical rebuttal, their colleague Sarah Palin comes along and starts yelling about "death panels."