Also, do you have a CPA?

This post does not create a CPA-Client relationship.

As explained earlier, it will be some variation of this: average daily balance times the monthly periodic rate (or some similar formula - check the terms of your HELOC) plus 1/120th or some similar fraction of the principal balance to arrive at the monthly payment (a.k.a. compound interest).Ask your CPA or other financial professional to review it with you.Also, talk to someone who fully understands the mortgage acceleration strategy.

Consulting with a tax professional is advised to ensure compliance and proper handling of deadlines.This post does not create a CPA-Client relationship.

I'd also partner with a lending company that understands how this is going work, and what your plans are.And last, but not least, I'd partner with a CPA to help navigate you to the ways of working this properly. 

I’m no attorney or CPA, so I won’t wade into legal or tax advice, but I’ve watched a well-timed 1031 turn a humble starter property into a stepping stone toward a whole portfolio.

@Edward Segaar With just one property just about any CPA can help you.

But if you’re unsure about compliance or plan to scale your real estate portfolio, I’d recommend consulting a CPA or attorney to avoid costly mistakes.

Transferring a 1031 exchange property into an LLC shortly after purchase typically won’t trigger immediate tax consequences for your wife if the LLC is a disregarded entity, as you file jointly.This post does not create a CPA-Client relationship.

Apart from ACH, which is free vs. a fee on other platforms, the software also keeps track of property analytics and can create a statement of cash flows (NOI/Net Income views also available) and has export functions to give your CPA come tax time.