Now the short answer is, unless you clean every square inch the property is still contaminated.

If you have the money, i would do that plus add a metal z channel going opposite direction of the joists ( screwed on top of the existing plaster ) and then add another layer of drywall. the Z channel leaves a space that helps in sound transmission. the problem is the sound is transmitted through the existing floor joists too, so just the insulation will not do it because the joists are still against the ceiling. this is something similar, but in this picture they used clips in combination to hold off hat channel from the existing ceiling which will lower your ceiling about another inch. 

Proportions and style doesn't tie in to what's existing or enhance it.

Professionals drill (two feet or the longest masonry bit available) into the hole every 24 inches around the exterior and interior (if the basement is not finished) perimeter of the building and spray the chemical into the hole.After you have sprayed the chemical in the hole patch the hole with cement so the rain doesn't flush the chemical out.

and am interested in exploring working with investors to enhance new properties or renovations in exchange for knowledge and a cut after expenses.

currently wanting to enhance communities by rehabbing property that is in distress.

Should conservatively fetch $3,000+/month or more after cosmetic enhancements.

Roof, all plumbing, all electric, all HVAC, all gas lines, adding bathroom, moving walls, all windows, huge deck addition, drywall every square inch.

I've been using Utilitech Pro fixtures in 3500K.I use the 12.6 inch ones in hallways and closets.

If you give a few inches soon they take a mile.