My preference is garden style.What sort of business plan are you looking at? 

We just adjust our rents accordingly based on average cost of the water.

She works for her mother's business and needs to move back home.I have read that my tenant is responsible for paying the rent until a new tenant is found. 

I also include a timeframe (3 business days) that the lease needs to be signed and returned to me, once it is given to them or they can face a forfeiture of their holding deposit. 

Those are the two extremes, obviously most businesses are somewhere in between. 

For those landlords who take security deposits in City of Chicago, is a separate business bank account sufficient for the security deposit or do I still need to set up the special landlord account that requires all W-9 paperwork from tenants etc?

There are many syndicators that had built a reputation for having executed business plans, very communicative, and accountable.  

Whatever you use, make sure it's state-specific.6) Putting a cap on utilities is smart, especially when you're starting out and have no idea what they're going to cost you.

I have taken a business partnership approach with this company, and have even mentored their excellent young CEO.

My cousin's fiance has a painting business and has done numerous jobs for family members over the years.