I go up stairs and knock, and knock, listen to hustle and bustle, knock again........Bottom line, the electric company cut off my tenant's electricity.

Use the stairs.

I am exploring the idea of removing the stairs in the main house to the 2 floor and stairs to the basement to convert the 2nd story to a separate unit(add stairs outside) and convert the basement(cut egress door). 

I plan to fix one unit downstairs, move her there and fix her unit. looking at her age and the fact that she is upstairs now, I think she will be happy to no longer have to take the stairs. 

For example, there are quality oceanfront homes for sale (as of this post) starting in the $650k price range. 3/2 slightly dated, but walk down your private stairs to the sand.

If you wanted to, you could just close off the stairs access and call it a day.

Just keep in mind zoning and code requirements. zoning is usually not a problem, but when a commercial is converted to residential current codes must be met which usually means two stair towers, fire separations, and sprinklers.PS: Loopnet is what I used to find my warehouse.

In my experience, many insurers will cover the house but not the roof, ensuring you have protection against fires, broken water pipes, falling down the stairs, etc.

Doing something with the stair railing might make it pop.

That means if you and another veteran apply for a VA mortgage together you can build or buy a property with as many as “six family units (the basic four units plus one unit for each of the two Veterans), and one business unit.”)My Take:I interpret this as possibly a mixed use building with 6 residential units and one business unit like a restaurant or coffee shop down stairs.