But, my answers are based on my actual experience being a real estate investor for the last 12+ years.I am 41 years old and currently own 160 units.

Vacancy Est: Historically 10%, but 15-20% should be used to also cover tenant nonpayment, eviction costs & damages.Tenant Pool: majority will have FICO scores of 560-620 (approaching 22% probability of default), many blemishes, but should have no evictions in last 2 years.

The original investment was a bond?

I've been in the investment space almost 9 years now, and been actively investing in flips myself, the last year.

Purchased my 1st rental property last year in Cleveland, a 2unit MFH with 10beds between the 2 units. 

Don't pay any other fees.Fix-and-flip loans will typically last from 6-24 months, with 12 months probably being the most common.

That last one lets him know when it's time for a drain and refill.

Pricing tools that exist on the market are decent, but you also need to know how to control it, otherwise, it will go nuts with unrealistic rates far out and extreme last-minute discounts. 

Lastly, they like building relationships.

That is usually the last time I work with them.