If you're not close to a 3" stack or building drain, there will be either a ton of concrete to open or you will need a sewer ejector pump.

Lisa from concrete shop:Sure Ed.

Before modern construction materials, you had plaster and lathe (instead of drywall), you had aluminum or knob and tube wiring (now it's copper) you had steel pipes for plumbing (now it's copper and/or PVC) and you had stone basements/foundations (now it's cinder block or poured concrete).

1.ii - There's no concrete reason to self-employ in this path, but as it's the most risk-adverse it seems the most tolerable to act 'risky'.

(but do it anyway, by the way).Here's what I would consider a more concrete suggestion if you really want to bust into the real estate game but think you are completely helpless to do so:Buy a duplex. 

I am battle with the city to either return the porch to original design, or bring it up to code for living space which includes a concrete footing.

The new shower was put in shortly after with a 3" thick concrete shower pan, walls lined with hardi and travertine tile installed.

I have seen them used on concrete floors, cabinets, doors, trim, metal, and the list goes on!

I wanted to learn concrete a few years ago, so I volunteered with a concrete crew for about 2 months, and I became pretty good at it.

Don't polish it.