The more you can reveal unknown variables in their rental history, the better.

We did the demo and removed the carpet and padding to try and reveal the cement slab floor. 

It will provide a best estimate at the expected long term cash flow and I expect it to reveal that the cash flow is minimal for non-active investors in the $30k RE.  

Although these are easy to forge, a close examination will generally reveal any flaws that could be telltale.

I am not so big on the claims of anonymity as depositions and interrogatories can make you reveal ownership status in most cases. 

Revealing to anyone, other than another investor, that you own an apartment building-well nothing good will come from that! 

Here are some tips for vetting potential tenants:Require a rental application: Have all potential tenants fill out a rental application that includes personal and employment information, references, and a consent to run a background check and credit report.Check their credit report: A credit report can give you insight into a tenant's financial history, including their payment history, outstanding debts, and credit score.Run a background check: A background check can reveal any criminal history or past evictions, which may be red flags.Verify income: Make sure to ask for proof of income to ensure the tenant has the financial means to pay rent.Contact references: Reach out to previous landlords, employers, and personal references to get a sense of the tenant's reliability and character.Conduct an in-person interview: Meeting the tenant in person can give you a sense of their personality and demeanor, which can be important factors in being a good tenant.Trust your instincts: If something seems off or you have a bad feeling about a potential tenant, it may be best to pass and keep looking.By taking these steps and thoroughly vetting potential tenants, you can increase the chances of finding a quality tenant who will be a good fit for your rental property.Good luck and keep us posted on what you decided to do! 

It was marketed as three income-producing units, but due diligence revealed legal discrepancies in rental permits.I revised my offer to about 25% lower than the original, reflecting these findings.

Due diligence revealed that a purchase price of $137k or less could result in 19%+ ROI, $1k+ cash flow How did you find this deal and how did you negotiate it?

I thought a double close would stop you from revealing your profit margin on the contract but with due diligence anyone can find out it would be public record