Of course property taxes tend to be more expensive than interest payments where I live.The FED is supposed to keep employment low and inflation around 2%.

I’ve read the legal paperwork regarding what’s done in order to quiet the title on a tax lien property. 

And also, since I am the borrower, am I correct in my understanding that I would be subject to a tax on cancellation of debt which would lower my total IRR.I saw many years ago (like in 2017) on BP that note investors were shooting for 10-12% IRR in a zero-interest rate environement. 

I’ve read enough to know that acquiring the LLC is a bad idea due to: unknown liabilities; tax liens and debts; loss of depreciation that has already been taken, and probably other reasons too.

Bigger property can provide bigger tax benefits as well.

A Roth IRA, as I'm sure you are educated on, will grow tax-free and you can withdrawal tax-free in your retirement. 

But, unless you’ve got a unique situation or tremendous wealth, like enough to trigger an inheritance tax, it MAY fit your needs at a very reasonable cost. 

That being said, most lenders will require at least two years of W2 tax returns to verify income and assess risk when granting a loan, so acquiring finance may be complex. 

@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.

If you don't want to squander it but want more passive, you could invest it in tax-advantaged mutual funds.