For example, if I purchase a site entitled to 100 dwelling units under a newly formed holding company and the only thing linking me to it is a shared PO box mailing address on the holding entity, the lender gets alerted.

Equity plus yearly return from cash until they are paid in full, for example?

Often times you will pay much more in taxes than if you pulled the money out, paid the taxes and penalty and then started investing in real estate.For example, with the financing you mentioned, the IRA must pay taxes on the portion of the profit earned by financing. 

Typical equity build up time is 5 years, depending on your market.But can you purchase another rental using your own capital?

Quote from @Phillip Austin: One of the best examples I found this year as to why you need a property manager (especially in Colorado).

Personal loans are typically shorter term maybe up to 5 years.

I saw an example recently in Bloomberg about how local regulations can really shape a landlord’s experience, from what I’ve heard.

For example you are putting in low grade laminate and all other listings are putting in high grade vinyl.

Example https://www.meetup.com/topics/real-estate-investors/

So, for example, a 4-night stay for a group of 12?