In another year as interest rates come down, and the boom of cabins that came online over the last two years starts to get sucked in, I think there's going to be a return to solid and steady growth in demand for new cabins.I love my numbers eithe way though. 

I'm negotiating a 7-8% return for them, and I will make interest-only payments until the loan matures (I'll ask for 2 years).

For anywhere you decide to invest in, paying all cash is going to net you a good return.

Depending on how long it will take to complete the remaining work and get the property sold, you could also try to find a larger general contractor; one that could self fund the work in return for a higher payday at closing.  

All they need is balance sheet & income statement to do the tax returns. 

@Adolphus Fletcher For multifamily investing, most real estate investors typically use an LLC for several reasons:Liability Protection: LLCs protect your personal assets from lawsuits or debts associated with the property.Pass-Through Taxation: Income and losses from an LLC pass through to your personal tax return, avoiding double taxation seen in C-Corps.Flexibility: LLCs allow for flexible management structures and are easier to maintain than corporations.Anonymity: In some states, LLCs can offer a degree of anonymity if you use a registered agent and form the LLC in a state that doesn’t require public disclosure of members, such as Delaware or Wyoming.S-Corps are should be avoided for real estate investing because of various reasons.

When I returned, she was fully on board and ready to dive in.

Looking at return on investment and cash flow of the property itself.

We've found it has superior reporting features, integration features, and is overall more efficient to work within than other REI-specific software.The downside is QBO is not set up for REI so you'll need to do that or work with an expert to ensure it is set up for your business appropriately.Something else to keep in mind is your entity structure and how your entities file tax returns.

If you are at 6%+ I would say make the extra payment as you have to factor in net (not gross) returns from what you would do with that money.