Some ducts in older homes  are not acessible anymore- Refer to Phil Hartten experience.

New shingle roof - $6-8 per sq ft New high efficiency furnace and all new duct work with 8 reagiters - $5000-7000New high efficiency tankless water heater with new 1" gas line. $3500-5000New hardwood flooring with stain - $10 per sq ft. 

Firstly, the basement walls' color was black / dark gray and we discussed on the phone that they will use some neutral color for it.

If that is the case I like my house to flow throughout, so I would use the same flooring and color you use in the other main areas of the house.

My very first meeting with lenders, I had mapped various sample financial deals (one for each lender) from the biggerpocket.com calculator, printed them in pdf color and showed the lender that I had an understanding/command of certain business terms (cash on cash, IRR, ...etc). 

It's a condo built in the 70s that needs some framing, drywall work, flooring, cabinets hung, bathroom surround tiled, electrical outlets replaced (because it's dumb when they're all different colors), & doors hung.

We are expanding and also adding a new story to a townhouse in Georgetown and need an investor-friendly HVAC contractor to do all the duct work and install another unit can you recommend a good one with reasonable prices?

I personally like the tile you have pictured but something with a bit of color could work too

I wouldn't blame the tenant but what I would do is paint the mailbox (and the post holding it up) a random color so if somebody hits it and the paint rubs off it will be easier to figure out who is at fault (as the paint will likely rub on the car that ran into it). 

But when I say full gut and rehab I'm talking: taring everything down to the studs, updating plumbing and electrical throughout, probably upgrading the panel, adding duct work for heating and cooling, new mechanicals (boiler, A/C, etc) , hardwood floors, new kitchen, new dry wall and insulation, paint, finish work, etc.