Using a single LLC is simpler and cheaper but puts all properties at risk if one faces legal issues.

I have a few questions regarding wanted to buy a full duplex or triplex.I would be using a HELOC on primary residence to get the 20% down payment + costs required to fix.1.

I use ESS for the call center and then they notify me of a move in and I login into my systems using a remote desktop and program my new customers.

I am not sure who you are using as your Realtor but I would reach out to a Anthony Wong who specializes in investment rentals or buyig the right primary that can be converted to a rental that will cash flow.

I'd recommend even using a CRM for that, maybe setting up a drip campaign.

Yes, you can use an attorney to close without using a real estate agent, and they can usually hold the earnest money deposit and distribute funds after closing. 

If you will be using a DSCR loan, property will be owned by your LLC but if you're the only person on there, he would have some right (or could claim) to that property upon your death or divorce.

I would most likely be using a turnkey for help if I bought property in FL and of course have no experience with those either.

@Francisca MacThere are many ways you can adjust all the settings… but the short “as it comes setup out of the box” answer is that there is no charge to a tenant to make a payment using a routing number and account number to post a payment.If the tenant opts use a credit / debit  card, there is a convenience fee charged for the use of the card.  

If the buyer is using a DSCR/commercial lender, it'll be the same outcome.I have a deal in my pipeline now for a refinance.