Avoid anything with condo association fees or homeowner association fees as they DECREASE CASH FLOW with no real contribution to the bottom line.Lastly, since you are new, when you do get a property DO NOT HIRE A PROPERTY MANAGER.  

I've read (all my knowledge is theoretical) that tenants on government assistance can be really rough on properties (I also see that as painting with a broad brush) but the government assistance side of that is pretty stable income, and it doesn't seem terribly difficult to raise rent either, just requires 60-days notice instead of 30. 

I am not a new investor :) but as someone who is working with them on a daily basis I will rank in order the buyers I am noticing:1.

The appreciation will always increase, but I have noticed better long-term value in small multi-family vs. condos.Do you have a purchase price in mind?

This may decrease the amount of dues owed per unit, but also creates major issues when there is a hail storm or other loss that effects the exterior and shared spaces of the property. 

You might notice some things are must-haves for your area and then you can look at anything additional you can add to stand out above the market.

Watch the heloc, the bank can retract them, without much notice.

Notice in this scenario the seller has 30% equity which I will be paying over time to him so the refinance will meet the 80 LTV. 

No notice was sent to our office or any addresses for our LLC that owns the property.

This was one of the few times I noticed there was an upper level, but they didn't include the area in the MLS system.