For example, high property tax is a huge problem for 1~4 unit properties while not a problem at all for large apartment building because it will be absorbed into the expenses.Lastly, I recall one interesting personal experience mentioned by author Lance Edwards in his book ”How to make big money in small apartments”.

Regarding budgeting, if you have ample capital and can absorb the large cost, then you can have a slightly increased capex to replenish the near term expenditure.  

I have been trying to absorb as much information as possible this past year through podcasts, books, webinars, etc., but realize I still have a lot to learn.I am currently renting in the city (Mount Vernon), but am looking to purchase my first house hack for 150k or less, next year when my lease ends.

Anyone that's very successful, you will be able to meet them, like Robert T Kiyosaki from Rich Dad Poor Dad who took just a simple course, did the work from the course and just kept learning and repeating the same steps.I'm a newbie as well, and you're right there is a lot of information to absorb. 

Lurked around this site for a few days and absorbed a ton of information (only time will tell if any of it really stuck) but I liked what I saw and created an account.

I too, like you have been just soaking up information--reading as much information that I can absorb.   

In terms of the floor footfall noise, I'd say area rugs and hallway runners make a big difference and could help some with the conversation noise too in terms of absorbing sound.

DO NOT DROP OUT...when you are in the classroom pay attention and absorb as much as you can and when you have a bit of time free, focus on cramming in as much knowledge about the business as you can.

@Mindy Jensen is right the bigger pockets you have the easier it is to absorb the unexpected.  

Priming over previously painted drywall is not necessary at all....as long as the paint is sound and sufficiently cleaned.The Whole purpose of priming is either to prevent a bare surface from absorbing the paint or to properly cover some glossy type surface so the paint adheres....unless you’re covering some type of stain/odor.How do you avoid this miscommunication in the future.....simple, scope of work would say prime in whatever areas you specify.....but priming over previous paint is Not typical, nor necessary.