Also, code-wise, it never hurts to ask the county.

., and to avoid "exceptions" in the title policy for things like unrecorded utility liens, unrecorded code violations, etc., I always recommend paying for your own title co.  

I sometimes will code the rent amount.

I would try to see if there are any experienced development consultants that know the ins and outs of the city and its codes to advise you.From (demand, path of progress, leed  time to demand) the sound of things I would expect the pricing to be the other way;pay for resi,commercial free.

You give the tenant a bar code that allows the cashier to pull up their ledger and prints them a rental receipt.  

USA.com for zip code statistics and also areavibes.comAreavibes can be a bit all over the place sometimes though...

You want someone who knows investing and knows strategies and options- who doesn't just KNOW code 1031 but knows every weird detail of it and creative ways QI's have been able to apply it.

Each new mayor promises to come in and clean it up like every new regime at the federal level promises to clean up the tax code.  

Have a lock box on vacant units so you can give them the code to enter the unit.

 :)  As @Richard C. mentions, your state has codes in place that cover due dates and when a payment is considered late, for all consumer payments not just rent.