When an appraiser is adjusting a comp to match the subject property, he or she will use an adjustment based on the difference in square footage.

subject to, higher risk.

The LLC sells the subject property and buys, for example, 3 replacement properties in a 1031 exchange. 

You could tell them to cancel the listing and you will find someone else to list it after a month not 4 months (the market take is subjective too, all dependent on what your house has compared to others, where it is located, the size of it, and so many other factors).

Very subjective question based on your investment knowledge, home market, investment strategy and requirements. 

Administrators are not subject to any such scrutiny and are really just middlemen.

You still claim the income as miscellaneous income and deduct property taxes and mortgage interest (subject to SALT and other high mortgage limitations) on your Schedule A, but that's it.2. 

Are you familiar with Creative Financing such as Subject To (SubTo), SubTail, WRAPS, Short Term Lending, and Bridge loans? 

I would assume that if its for a short term loan, it would likely be better terms with the HELOC but I dont know much about the subject honestly. 

Creative financing: Explore seller financing or subject-to deals for your next property, which often require less upfront cash and bypass traditional lending limits.You’re on the right track thinking long-term—house hacking and leveraging your duplex are great moves.