As an example I constructed a 4 unit condo building in the Mount Airy neighborhood of Philly at the beginning of the pandemic.

If you mount the new beam below the ceiling $1500 material labor...if you put it up into the floor joists above $2500-3000 (meaning so you can't see the new beam once the ceiling on the drywall is repaired)  Figure another $65-70 per sheet of drywall needed for repairs. 

The option I keep coming back to is ceiling mounted cassettes.

People who have summited their personal Mount Everest and achieved the so sought after Financial Freedom.

Quote from @Blake Cogdill: In our area of Mount Pleasant, SC, people continue to move here paying higher prices than the locals.

Odds are the drain line, condensate pump, putting down new riser blocks or mounting blocks, the whips and line sets, new disconnect box, new low and high voltage wiring aren't in your Google pricing.

For example, could this potentially be a cash boom opportunity within the adjacent areas such as Kenosha and Mount Pleasant where one could buy low, sell high within a relatively short amount of time through appreciation, or would the presence of Microsoft increase cash flow in those areas?

Ideally, closer to the main strip such as some restaurants on Commonwealth or especially on Mount Vernon.We are doing the mid-term rental route on Airbnb.

You don't even have to drill holes in the walls to mount stuff.

Some decent ones in Mount laurel...