What builders don't tell you about power backup in Chandigarh

Omaxe Gardenia Floors — I'm looking at these for an investment, but the power backup situation is really bothering me. Builders always promise full backup, but it's often just common areas, not the full flat. For a tenant, especially families, full flat backup is crucial, right? I know what marketing brochures don't tell you. Does this impact resale value down the line, or tenant attraction? Also, what about elevator maintenance response times there? Don't want future tenants complaining about basic amenities. Has anyone faced issues with these specifics after moving in?