You need to consult your local laws to see what the legal amount of time is and decide for yourself if that's "reasonable."

Chris is spot on here, the new law is going to be in effect from Friday first of November.

Happy tenants are more likely to renew leases, reducing turnover costs and vacancies.Legal Compliance: Property managers ensure compliance with local, state, and federal laws, including regulations on rent control, fair housing, tenant rights, and eviction procedures.

I also have no intention of investing in rental properties in the UK no more due to a lot of horror stories and potential new changes in laws, which is why I am very eager to explore the US rental market.I am not a US citizen, my partner is and it will be a joint venture.

Interesting article about “Squatters’ Rights” in California; how they originated and their intended purpose vs. how they are currently being taken advantage of.California's Squatter's Enable Tenancy Rights After Just ...

If your local law allows it, see what everyone else is doing and go by the norm. 3 months rent is a substantial amount for some, but really helps ensure the financial quality of a tenant.Sometimes I have immigrants who apply who work their tails off and can't afford the 3 months up front.

There are items required by law and in general those are related to the safety and basic comfort of living. 

The fact that this is a growing technique indicates how unfair the Landlord-Tenant laws are.

Here's the actual law with the important part underlined:§ 55.1-1251.

It depends on the state laws where the property is located.