Roof 25 year life span, floors 10 year life span, etc.

I buy houses from wholesalers in an area spanning 9 counties.

Life span for Carpet is 7-10 years in most courts in CA.

Things like engines, shafts, paint, etc all have a life span and it needs to be replaced/repaired. 

The finished product will be new 6,500 sf. open span space with steel beams and everything.

hello,I'm trying to figure out how to fine information on a assets life span.

Personality is important, because we plan on having a business relationship with this person that will span many years.

All the houses in a neighborhood aren't going to be updated with these systems in the span of 4-6 months.

or say "what's the code for the span on these joists".

My question is what niches (real estate projects) do investors typically jump into with private lenders taking into account that a lenders capital raised to fund a project must be paid back in a short span?