Here is what I have in my lease. It cost money to advertise, show, sign new leases, pay managers to get tenants, etc. I charge at least two weeks rent, even if I fill the unit without losing any rent. I want plenty of time to turn a unit and not have to do it on my dime. The tenants are obligated for the full lease, although no judge would likely ever give it to you.
I have received two month's rent once, for a corporate transfer. It is not rent, it is a fee. The relocating company paid it without a problem, as it was in the lease.
55. MINIMUM CHARGES FOR REPAIRS _______________ (Initials)
There will be a minimum charge for damages that are not repaired by RESIDENT before last day of lease. Actual charges may exceed these minimum charges. Broken Windows $150 ea; Range cleaning $200 ea.; Refrigerator cleaning $100 ea.; Burned out bulbs $5 ea; Torn Shades $20 ea; General apt. Cleaning $550; Clogged toilets, $125; Carpet cleaning, $200; Missing keys, $5 ea; Broken mini-blinds $25; Broken vertical-blinds $50; Couch/Loveseat removal $75; Mattress/Box spring removal $40 each piece; Nuisance calls, $50; Maintenance/repair labor $75.00 per hour; Cleaning labor, $40.00 per hr. On-site Storage, $250 per month. Lease termination fee, 2 months’ rent; lease re-marketing fee for early move outs $50% of one month’s rent. Extra occupants, if approved, $50 minimum per month.