The duration to complete the project can span beyond the time needed for constructing a new property.

Definitely make sure you get more info on the furnace as the typical life span is around 20 years

My area it is 6 sf to replace. 2800 sf *$6 sf= $16800/ 10 year life span/12months in a year= $140 per month for 1 item in a capex budget.

You have to consider purchase and installation costs, plus any maintenance over the life-span of the system.

I recently received a fine from L&I for a fence on a vacant lot I own next to a property I own that spans between the front of two row homes (not on a corner) that is 6ft tall and made out of wood.

But should I just have one over each door or should multiple awnings span the entire length of the front of building?

But the draw back is its carpet, and the short life span and eventual replacement, if its to be held as a long term rental.

I understand that the loan origination fees are amortized over the life of the loan, so if you get a hard money loan and paid $3000 in origination fees, you would create an amortized asset with a 1 year life span, because its a 12 month loan (thus depreciating all that hard money origination fees in the year the loan was created)?

Zip codes often span school districts and city linesIdeally you want a house in the same area (say 1/4 mile), built around the same time, similar size and condition, in the same school district and city.  

Walled and gated, it spans 2.66 acres and features a motor court with a fountain surrounded by gardens and trees.