Upon inspection the appraiser will see the crawl space and see it was a mobile home plus a HUD tag and public record.One of the requirements in mobile home financing is the property "Must" be on a concrete permanent foundation(in order to be real property) on top of that it requires concrete pillars, skirting and the "Well and Septic" dug and placed within legal distance from subject property.

Creative finance - seller finance or subject to.

However, should you have net rental income that is subject to net investment income tax, then REP status would be helpful to avoid NIIT.Just to be clear, if you have an STR and you materially participate in it, you aren't subject to NIIT. 

@Thelma Bal Best content on Cost Seg, bar none, is @Michael Plaks' posts on the subject.

Wyoming allows for the creation of dynasty trusts, which can last for multiple generations, often up to 100 years or more, designed to preserve family wealth across several generations without being subject to estate taxes each time the assets pass to heirs.5.

In most cases - we're talking about a market rate property - and those are subject to 60bp MIP.

.🔹 Ideal in Any Market – Whether home prices are rising or falling, lease options allow you to lock in today’s price while benefiting from future appreciation.Other creative strategies—like seller financing, subject-to deals, and the BRRRR method—can also open doors, but lease options remain one of the most powerful, low-risk, minimal cash out-of-pocket ways to build a portfolio.

So, if I withdraw $60K, about 75.24% of that should come from contributions (since that’s how my balance is structured).75.24% of $60K = $45,014 → Comes from contributions (no tax or penalty)22.38% of $60K = $13,428 → Comes from earnings (subject to taxes & penalty)Taxes & Penalty on the Earnings Portion ($13.4K)Federal Income Tax (24%) → $3,219Early Withdrawal Penalty (10%) → $1,342Total Tax & Penalty: $4,562Net Cash After Taxes and Penalty Fee: $55,437The DilemmaIf I leave the money in my Roth 401(k), continue contributing $525/month, and earn 8% annually, my balance could grow to:$229,865 in 10 years$606,905 in 20 yearsBut if I buy the property, it could generate $15.6K/year in pure cash flow, plus appreciation.

Yes, as S-Corp owners receiving W-2 wages, employee deferrals to a Solo 401(k) are subject to FICA taxes (Social Security & Medicare).

and are you certain that the appraisal is based on AS IS value and not subject to value (ie value after repairs)?