If we're co-borrowing how does that work- it seems circular?.

To install you simply cut a hole for sink using a jigsaw for the sink or you can use a circular and hole saw for the rounded corners.  

For example, my circular saw seems to run at about 1/4 speed.

Look for evidence of nails/screws failing- little circular holes in a line.

Power tool wise obviously a circular saw is a big one... the saws all is a great go to as well.  

I was thinking of exposed, circular ductwork attached to the ceilings to save money on soffits and give the work more of a loft feel.

Prop 2 = a old stone one room schoolhouse that is actually 2 stories, 3 bdrm, approx 1,500 sq ft, full new roof, structure solidified, mostly cleaned up inside but also a full gut from floor, walls, ceiling, some parts only framed out, a few elegant details in place like the original slate chalkboard & a circular staircase (surely not original ofc, but nice).

I'd turn to CBRE cap rate surveys or Marcus Milichap's MFR circular for 2022.

I needed to clarify @Mindy Jensen, let me try it again; would the cost to skim coat and texture a circular pattern like this, cost the same as removing a popcorn ceiling, about $3,000 to $4,000 depending on size of house? 

Correct it's a circular calculation- so the gain will go into your overall income determining bracket and the rate applies proportionately