The question is: do landlords have to issue 1099s since technically income derived is passive in nature (i.e. not an active trade or business)?

However, I suspect if you've found a really good deal it should easily meet the self sufficiency rules and the income derived from the property along with your own income should easily be able to qualify the property.If the income from the property solely is able to qualify the entire payment then you know you have a stellar deal.

As food for thought, a junior lien who doesn't assert their rights derived from their security interest in the property can actually lose those rights.  

Citing ressons that are derived from a further deep dive inspection of the property. 

Zillow is, as others have stated, a business model based on getting you to their free site in order to derive profits later via other means. 

The financing must be non-recourse and there is a tax implication on the income derived from the borrowed funds (UDFI), but this can be a very powerful means to invest using leverage and achieve a higher cash-on-cash return for your IRA dollars as a result.You  cannot rollover Roth IRA funds into a Solo 401k, although such a vehicle may be of interest to you going forward since you are self-employed.

@Dennis HertzlerIf you wish to derive income from flipping real estate, a self directed IRA will not be the right vehicle.  

But sites like: Zillow, Redfin, etc. are not very accurate source to derive comps.

It also is loosely derived from underwriting guidelines. 70% is the amount that a lot of lenders will lend against an investment property.

In the event you conduct an operating business inside the IRA, all income is subject to UBIT.Lastly, if you're able to pay off your mortgage a full 12 months prior to the sale (zero debt ratio calculation at time of filing) of your real estate, you can avoid UBIT taxation on any of the gains you derive at sale.