Flipping, if done regularly and consistently enough, could constitute an active trade or business and doing so within the 401k could subject the returns to UBIT.You are correct that passive investments generate tax-deferred gains within the account until the funds are distributed.

This response neither constitutes legal or tax advice nor establishes an attorney-client relationship.

Statutes & Constitution :View Statutes : Online Sunshine (state.fl.us)

If the plaintiff has an ownership interest in just one or two rental units, then the court shall presume that issuance of an order pursuant to subdivision (c) would constitute a material economic hardship.(3) If the plaintiff has an ownership in 10 or more rental units, the court shall presume that the issuance of an order pursuant to subdivision (c) would not constitute a material economic hardship.

The rest of my stuff is located locally here in Los Angeles and constitutes the largest portion of my portfolio by far.

The banks can also contend that this constitutes an attempt to evade foreclosure.

In our states the Bar has not decided whether this constitutes the practice of Law.

Former Justice Potter Stewart of the Supreme Court of the United States, in attempting to classify what material constituted exactly "what is obscene", famously wrote, "I shall not today attempt further to define the kinds of material I understand to be embraced . . .

My wife and I have done what I will constitute "house hacking" for most of the nearly 4 years we have owned our home, renting out a room or two to friends going to college in our city.

It's not in excess which, with my understanding, does not constitute interest.