But now that it is my second purchase, and now that it may be more complicated with higher interest rates and potentially needing to get a loan for repairs too, I want to read up on how mortgages work (+refinances, ARM's, etc.). 

When you are working with the right kind of loan for an IRA, it will work, and most of the complications you note will go away.It will look like this:The LLC will purchase the propertyThe LLC will obtain a non-recourse loan for the purchaseThe LLC will receive the rents and pay the mortgage and other expenses associated with the propertyThe net cash flow will be tax-sheltered gains to the IRANote that when an IRA uses mortgage financing, the percentage of the income that the IRA receives as a result of that non-IRA money in the deal is taxable as Unrelated Debt-Financed Income (UDFI). 

Some have suggested house hacking SFH instead to avoid these complications but I can't seem to find information on how easily single rooms in SFH in Vegas rent out, at what prices, etc.

It complicates my financing situation a bit (I have a written agreement to up the funded amount to 80% of an agreed to ARV if repairs are completed within a year).

It all gets extremely complicated, and doesn’t necessarily seem logical, but it’s the tax code.  

In most cases, neither is warranted.Warning: I am not an attorney and this can be a complicated topic.

To potentially complicate the matter, we have since sold the home and cancelled the insurance policy. 

like no joke i was reall over complicating the idea on how to float them, but the month to month thing put me way at ease. so let me ask, do i just keep the utilities in my name and charge the snowirds by just adding them into the rent agreement? 

In most cases, neither is warranted.Warning: I am not an attorney and this can be a complicated topic.

In most cases, neither is warranted.Warning: I am not an attorney and this can be a complicated topic.