Is there a better option than a sawz-all and a metal cutting blade?

It seems like the previous owners or manager used a piece of metal to cover up that leak since the metal was rotting of water.

The entire dropped ceiling is being replaced with new tiles and the metal brackets holding the ceiling are being painted white instead of the off white they currently are.

If you are not self-employed or starting a new business you need to consider the SDIRA.You can contribute up for 52k a year in a Solo 401k, as well as, much greater flexibility into what you are able to invest in - real estate, precious metals, those are viable investment options which are not offered by traditional plans - hence why this is so valuable for REI's. 

Put a metal roof on and you won’t have to deal with it again.

Will spray on metal primer plus a few coats of metallic paint work? 

During cleaning I see the back door which is metal with a large window was broken.  

@Adam Craig I would replace the white metal post with wood or encase it.

an equipment appraisal is wise for tank value, metals are nuts right now).Feel free to shoot me a DM and we can connect on this sometime.

What I get out if it, is I build it once and it will never fall down.The home stores sell these thick metal bars, but they are more expensive.