Good idea to buy new windows for rental property?

[Adam Craig]

Nearly half of my homes have original or very old windows. They are functional but dont operate well and lose a lot of heat, not to mention they look old.

Does it make sense to upgrade windows on my single family rentals? they are in 1100/month B/C neighborhoods? I plan on holding them for a long time.

Considering pleasing tennats and resale would you spend the money?