Here are some other things that could go wrong which may cause failures:Unknown necessary repairs (i.e. sewer lines, roof, etc)Not having cash reserves to cover vacancies / major repairsUptick of crime / vandalism in neighborhoodVandalism of propertyInfestations (pests, other)Bad tenants / No tenants / tenant family issue impacting stay (i.e. death, divorce)Rezoning of school districts / Loss of accreditation of school district Insufficient Property Management (not addressing tenants concerns, no notification of repairs timely - causing further damage, etc)Not following market pricing on rental / raising rent to frequently or too much at onceLegal issues (i.e. tenants sue for injuries on property, taxation, etc) I think you get the idea.

This might include things like intent at the time of purchase, time held, whether a property was marketed for sale, frequency of such transactions, whether you are personally flipping houses separate from the plan, etc.If your IRA is flipping properties on a regular basis, then you will surely want to speak with your licensed tax advisor to be sure you understand the ramifications of UBIT taxation, and whether this tax on the gains from flipping will still leave your IRA with better returns than other options, or if you might need to look at different strategies for the IRA such as long term rentals or hard money lending.

"Paying yourself a bonus" sounds suspiciously like you're working within a C-Corporation and that may be your first issue right there due to all the inherent issues involved in a C-Corporation with double taxation, etc.

The one real exception being exposure to UDFI taxation on leveraged investments that a Solo 401(k) is exempted from.  

@Todd Dexheimer, you'd better be knocking on wood when you say that:)I just did some cross sectioned analysis for a client based on income and appraisal taxation coupled with growth patterns.  

I don't know how a rollover IRA compares to a roth in terms of taxation (this is all kind of confusing!)

An LLC gives you limited liability without imposing double taxation on you, the way a corporation would, where the corporation is taxed and then you are taxed again when the corporation distributes profits to you.  

Try North American Savings Bank and First Western Federal Savings as leaders in the field.If the trust is under an IRA, then you will want to be sure to educate yourself on the concept of UDFI taxation on debt-financed real estate income.  

@Kyle M.What you are likely referring to is that with real estate purchased outside of a tax-sheltered vehicle, depreciation can taken be against taxation on income.

Does that change the taxation and deductions any different than the above scenario, in our own names?