I’ve found a duplex that seems to be in good condition, with both units currently rented out.

I generally see literature as such, and cannot tell if having a part time employee removes the chance of solo 401k or if the custodians just don't want to deal with it:"IRS rules prohibit contributions to a solo 401(k) if you have full-time employees, but you can use the plan to cover yourself and your spouse into retirement."

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Streamline your communication process to secure quality tenants.Focus on QualityThe condition of your property matters more now than ever.

Quote from @Daniel Tanasa: Another option is to get a small cash out refinance from the house you plan on fixing up, if is in financeable condition, and use that to fix it up, while still cash flowing.

And agents are legally prohibited to engage after closing - at least per Wisconsin State law. 

However, after renovations, the numbers improve significantly, and the challenge lies in bridging the gap between current and future performance.Expenses typically run at a 30-50% expense ratio for mobile home parks, depending on management and infrastructure conditions.

Its proximity to campus, turnkey condition, and rental history make it particularly appealing to investors seeking high cash flow and low vacancy risks.

What questions should I ask to understand the property’s condition and the heir’s willingness to sell?

Nashville, Dallas, etc etc)Yeah, I know states like Florida and Arizona have prohibited local municipalities from restricting non-owner occupied STRs.