safety

I know the most popular answer might be "You don't", but there is a multi-layered flooring debacle (squeaking, groaning and possibly rot) going on in our kitchen and I wanted to know if there are any leads or insights on how to remove asbestos (bottom layer above subfloor) without paying 20k...

It seems there a lot of talented and helpful people on this board. My issue is more about safety and usability. My home has circular metal stairs as depicted in the photos. We are at an age where safety is becoming more of an issue. Also, large and small dogs use the stairs. (not sure who...