The only situation when the stairs have to be used on the top floor is when going downstairs to the backyard.  

Based on a quick answer from Perplexity it seems like there would be no issue with you buying the home and collecting passive income, but you may not be allowed to manage it yourself since that is considered active work.

Cash from an equity line of credit How did you add value to the deal?

It means the seller has listed the property with a flat fee listing service.

Do you have a loan lined up? 

Just my two cents, best of luck on the journey! 

Build your network by joining local real estate investor meetups or online communities like BiggerPockets.

Cold Called the seller.

Instead, focus on improving your marketing and responsiveness.

Cold Called the seller.