This is the link you should use as a resourse for information. I have pasted in the part about deposit money and escrow accounts. This information is from the state web page. Please note the last paragraph. An escrow acount has nothing to do with the number of properties you rent but the amount you take as a deposit. Everything over $50 goes into escrow.
A security deposit is any money paid by a tenant to a landlord that protects the landlord against damage to the rented property, failure to pay rent, or expenses incurred due to a breach of the lease.
The security deposit may not be more than two months' rent. If you are overcharged, you have the right to recover up to three times the extra amount charged, plus reasonable attorney's fees.
You must receive a receipt for the security deposit. The receipt can be included in the written lease. There is a $25 penalty if the landlord fails to give you a receipt.
The receipt or lease should tell you of your right to receive from the landlord a written list of all existing damages in the rental property, if you make a written request for it within 15 days of taking occupancy. If a list of the existing damages is not provided, the landlord may be liable for three times the security deposit, less any damages or unpaid rent.
The landlord must put the security deposit in an escrow account. When returning security deposits of $50 or more, the landlord must include simple interest of 3 percent per year, accrued at six-month intervals from the date the security deposit was paid (1.5 percent every six-month period).