@Sheila Reyes hi Sheila, I invest in the same area. I believe that JSQ and UC both have huge potential given proximity to the city. The price has gone up significantly for the past 1.5 years, almost doubled, but in the long run, I believe it is still under-appreciated.
In terms of house hacking, UC can be a little tricky as the city itself is insanely dysfunctional, but very doable. my recommendation for UC is that don't try to go by the book and use local people who knows how to deal with the city. If you purchase anything in UC, make sure you get the rebuild letter prior to closing. it is the only legal document that says how many units are legal in UC. Tax record doesn't mean anything in UC. there is no Certificate of occupancy either. it is relatively safe area with good tenants, based on my limited experience.
If you are looking at JSQ, walkable distance to the path station, it will be hard to find anything that give you positive cash flow. it should be looked at as a long term investment.
Otherwise, you will find positive cash flow properties in North Bergen, on the west side, but appreciation point of view, it has less potential than the east side IMO.
I got a lot of help from BP when I first started 2 years ago. I'm not an expert by any means, but I'd like to pay it forward. Let me know if you need any help.