How about investing in Solar panels? The federal government is handing out 40% tax credits on the installation cost . This assumes you're using American made products that provide a 10% tax credit bonus. 30% is the standard tax credit no matter what you use. Add to this a MACRS accelerated asset depreciation over 5 years and I think you've got a win-win that is hard to beat.
You've reduced your utility bill, "gone green", and not bothered any tenants to get it done.
------------------------------
Justin Vosburg
Property & Equipment Supervisor
Affordable Attic Self Storage
Harlingen TX
------------------------------