It’s either that or to live with it.A side note: it might be that the owner is a slumlord, not because he/she is an evil person, but is simply a good intentioned person who doesn’t know what he’s doing.

I am aware that NJ has a personal occupancy provision in which the landlord gives at least 2 months written notice stating that the owner would like to occupy the downstairs unit once the tenants lease expires.

HiCan I as the administrator of the deceased estate use a PO Box for the administrator address and not my personal address?

I do that personally...and my employer does it as well. 

I also own a personal vacation home in the Poconos.

You need to look at your personal risk/reward factor. 

So I bought this house for me as personal residence & did live there the 1st year.

For ex, of more than one person is in need of service how would that be prioritized?

And we've done it with the stock market almost fully recovered back near ATH's, the housing market staying strong despite huge changes to interest rates, etc.Maybe it's all a mirage and one last hurrah to hold on before the big crash everyone has been anticipating finally does come, and I've been a bit of a doom and gloomer myself, but I think if you'd asked a year ago if it were possible to get back to 3% inflation in a year with the stock market within 5% of all-time highs and housing prices still within 5% of the peak every single person would have said it was impossible. 

From a tax perspective, an LLC is a disregarded entity (meaning it is reported on your personal tax return) until you elect for the LLC to be treated otherwise.