Hi Caleb Rehg,If you have employees you will have to pay quarterly PAYROLL taxes, but these can be taken care of by a payroll servicer such as Gusto or ADP.Otherwise, if you expect to have a substantial net income from the rental property at the end of the year, you may opt to make quarterly estimated tax payments so that you that you don't get surprised by a tax amount owed with your tax return.

Purchased replacement property for $1M using the full $480K cash to cover down payment and closing costs.

During Covid I deferred mortgage payments, so I owe a $30K balloon payment upon sale or refinance. 

You use your down payment money as cash to do the rehab.

You can potentially get a payment plan but that would only be on owner occupied asset.

I believe you can do a conventional cash out refi with your ownership interest functioning as the down payment.

The Fed will eventually allow interest rates to fall, and all that extra interest showing up in your payment calculations will shift back into the profit column (where it usually hangs out).  

For example, can you shut off the payments if you are moving towards eviction?

While an FHA loan with its low down payment might seem attractive, it's not the best fit for a rental property in Jacksonville.

Down payment?