What are your buying parameters for buying a multifamily property

[Spencer Gibson]

 I am currently trying to identify what my ideal parameters are for identifying/buying multifamily properties. Since I am brand new to this side of real estate I was hoping that some of the vets out there might share with me your ideal parameters or checklist that you use before deciding to make an offer? 

For example:

1) Class type- B/C class

2) ideal property size- 16 or more doors

3) Vacancy rate- nothing below x%

4) Absorption rate- 

5) Cap rate / coc return- 

etc..

I realize that everybody will likely have different goals for investing and will be in different markets so this will drastically change certain answers to the above but if you could also share your actual numbers alongside the checklist this will be very helpful to me. 

Any information or feedback is much appreciated!