Same for roof, water heater, applicances and etc.  

Look for the application for probate...and that specific l information will be located in that area.

You'll get more applicants and may be able to be more picky.  

These new rules apply to  options with terms greater than 12 months and now require different accounting applications for the seller, per the international accounting standards board and GAP must be used even if it's mom and pop selling, no shoe box accounting methods allowed anymore in connection with option contracts. 

But the case where you are buying, rehabbing and selling within your IRA would in most cases not be applicable for UBIT, here is food for thought or arguments:(1) Your IRA is not you, and your IRA is for your benefit, and is managed by a directed trustee or custodian for your benefit(2) Any investment in your IRA will be deemed as Passive Activity, since you cannot materially participate in the investment from your IRA (else it is a prohibited transaction)(3) Your IRA does not file any self employment income taxes(4) Your IRA may file UBIT based on UDFI (assuming the IRA has borrowed funds for acquisition or rehabilitation)Now if your IRA invested in an pass-through which did the flips as you describe, the entity itself first must satisfy the requirement of a "real estate operating company" to receive any exemption, else if it does not it could generate a UBIT for your IRA as an "operating company".As others have mentioned, please work with a knowledgeable professional in this space for your specific situation.

I have a vacancy and an applicant who is section 8.  

You are not asking for the application (which might have social security and bank numbers).  

I am planning to bid 0%NOTE: Statutory fees applicable to each purchased delinquency include: (a) $10.00 Publication fee (35 ILCS 200/21-135); (b) $100.00 Sale in Error Fund fee (35 ILCS 200/21-330); (c) $80.00 Indemnity Fund Fee (35 ILCS 200/21-295(a-5)); and (d) $10.00 Automation fee (35 ILCS 200/21-245).

Even 3X is putting a lot of people close to the brink, so if someone was just barely at that level but had other unfavorables I would probably decline their application.

@Erin K. those products @Jon H. have mentioned are not really designed for the application you mentioned.