I do know a number of the roofs need to be replaced soon.

I had 12 solar panels and a new roof installed.

Roof/HVAC/pipes are new?

In an effort to further increase the energy efficiency of the property, I had 12 solar panels and a new roof installed.

I need a new roof on one of my commercial investment properties.

You have costs that go up and even if you didn't have expenses this year, eventually you will need a new roof, furnace, hot water tank, etc. 

I am putting on a roof on one of my properties.  

.- A year later I built up money for rehab (cash + busn credit card) - $30K - rehabbed the entire house, except the roof, windows and doors.- Property now rented for $1000 per mth- Current Value Estimates: Redfin - $114K, Trulia - $113K, Zillow: $113K; still doing research on comps because the area is hit and miss so last I saw was a projected $100K***************************************************************************************************************************- Navy Federal Credit Union say they can do 65% of original purchase price in cash out refinance - $34K- Hard-money lender offered $30K at 9.9% for 6 months as rehab loan, which I'd use to replace roof, windows, doors, and cutdown at few trees;  then cashout refi for 50% of the appraised value between 6 and 9 % depending on personal credit.

The efficiency of a solar installation is dependent on many factors - location (or average daily sun hours), house orientation (15deg SSE ideally), roof inclination, shade obstructions (on the roof and/or around the house), consumption, components used, inverter or microinverters, hail resistance, warranty, utility payback vs net metering.

You need licensed contractors and permits for electrical, plumbing and for major things, someone who knows how to put a roof on and address foundation issues.