All areas of these zip codes are not quite the same---things can change pretty drastically block to block and as you move further east past Hwy 71.

Block time for prospecting, networking, showings, personal time, etc.  

It changes by the block.

last year I did my taxes with a random HR Block person as I was doing no fun!

If you did , prefill, you should just be able to sand smooth with a sanding block.

Jersey City has been extremely hot for years, and like @Michael Klauder said, the competition is quite fierce and you have to know the area well as the "vibe", so to speak, could vary drastically from block to block in these bigger cities.Hudson, Essex and/or Passaic counties have multifamily inventory, a high percentage of renters, and convenient transportation options for your commute into the city, so those would be a good starting point for you.

Impact on the block and appreciation.

For all the wholesalers out there, are there words or phrases you shouldn't use when text message marketing that may be getting filtered or blocked by cell phone providers?

I can work in blocks of time, 3-4 hours phone time in the morning. 3-4 hours phone time in the evening.

Where there's risk, there's reward.Just do your due diligence on the neighborhood/block you're investing in and make sure you know your sub market well.