There is no real estate investment that will give you that return, no doubt about it, not without a whole lot of risk exposure anyways.As far as taking a loan against your 401k, as mentioned, the longest time would be 5 years to pay it back.

Anyway, I’d probably use it as the place to put excess materials.

We are real estate professionals, and can use excess depreciation (tax losses) to offset this income.

I'm trying to get more exposure for a strip mall that my dad has and I want to make an aerial map of the location of it with labels/pop ups of other notable nearby businesses/streets.

That's a bit higher than I'd leverage when using a 1st and private $ 2nd to gap fund, but not excessive.

What you can do to limit your exposure to this theft is the following.Buy multifamily & do not let all the units go empty at the same time.

There are no state limits to late fees here in Mississippi, but if a judge finds them excessive they can simply refuse to enforce it so it is best to keep them reasonable. 

I was looking to diversify my investments and reduce (but not eliminate) my exposure to stocks. 

My point is, if you use a HML that doesn't have money seasoning requirements you can shorten your timeframe and decrease your exposure to the debt and end of 0% term.

@Patrick Philip, I'd say "hot" generally refers to a seller's market where inventory is low and prices are high because of excess demand.