In San Diego solar is tough to beat for power generation as the sun shines all year.I have solar on my own home but do not have it on any of our rentals. 

Central Oregon you will see sunshine but more of 4 seasons..

Let those tenants do what they want, they can't outsmart sunshine in AZ. 

However, one thing I would add is that, when vetting a Sponsor/deal, their acknowledgement and analysis of a "bad" situation is certainly welcome.For example, a sensitivity analysis that supports say a 2-3% return even if occupancy and rents don't come anywhere near projections, is still relatively attractive given potential returns on other investment vehicles.If a Sponsor you're considering is all rainbows and sunshine, I would take that as a red flag and move on.

Chicago is not the ideal market for solar because our electricity is relatively cheap and sunshine days moderate. 

As another example when half the houses on the block are in foreclosure tough to look at your property and see roses and sunshine.

It's not all roses and sunshine. 

Sunshine Title and All Florida Title are both highly recommended and allow double closings.

Sunshine

Once the economy goes into “correction” mode lending and terms may not do so good ...so make hay while the sun shines and take action .