I get the disks from a metal recycling place. 

As I understand it, anything built pre-Katrina that survived had a new roof put on about 20 years ago, but from Google street view it looks like a lot of them are metal. 

Using materials with a higher density than water, composites, metal, plastics etc. etc. you can either do something and hope it floats, or you can find the necessary equations and figure out first the weight of it all, cross reference that with the water displacement weight, and calculate FIRST whether the boat will float or not.Everyone that does DMM is basically building boats this first method.EVERYONE that does DMM is  shoots arrows in the dark, and HOPE some will stick.

I am 23 years old work as a union architectural glass and metal technician (4 years experience).

The cap rate allows you to measure and compare the property's performance (and potential performance) as an investment compared to other properties, and compared to dissimilar investment opportunities (such as stocks, bonds, precious metals, etc).The cap rate is also the primary determinant of a rental property's value.

In the beginning although I was running numbers I was staying away from houses I would not want to live in even though they met all standards.

I am not looking for a typical metal frame, but for more like a "seven shaped" post (or similar) with a modern aesthetic in which a sign can hang. 

(mine is having 1 million dollars).As a great metal band lead singer once said: Nothing Else Matters!

The new mirror is secured with  2 spiral style drywall anchors (metal) which are rated 40 lbs each.

I met all sorts of neighbors after that who came by to tell me I shouldn't have.