Think of all the things that could go wrong and see if the lease addresses them: unauthorized pets or tenants, early termination, security deposit, lease violations, late rent, eviction, lawn maintenance, parking, etc.5.

Settle up any deposits and rent payment timing issues13.  

Fake rents being deposited. 

How long do you have to gather the deposit needed (I'm assuming it's somewhere in the neighborhood of 1%)?

In a good month, its two minutes to write and mail a receipt after the tenants deposit it.

Direct deposit from their account to mine (ACH)2.

In various areas I'm seeing rental % increase caps, 90 day notice for increases, banning or reducing application fees, reducing deposits to 1 month rent. 

@Everett Morris contact your bank and  also smaller  credit unions and bank in your area  and  ask for a personal LOC ...rate  will be  high  if you qualify and  you  likely   will need  to pull  funds  out and  deposit  to your  account  and let  season for  2-3 months   before you  can  buy another property

Automatic deposit in my account first of every month.

You are basically depositing all your income into the HELOC, and paying all of your expenses out of the HELOC.