Benefits of an LLC: Forming an LLC can help separate your personal assets from your rental properties, providing an extra layer of liability protection.

I have a totally separate LLC bank account for all REI expenses as well as a separate business CC and Lowe's CC.

You can get the best of both worlds on cash flow and appreciation by doing short term rentals once you move out, or by doing a house hack, where you rent out an ADU or separated basement rental on short term rental platforms while living in the other piece of your house.

The real estate guru's will tell you that you should call the credit card companies (3 separate companies) who offer the 0% APR and request to get the maximum amounts on all three.  

The wall will raise the ceiling in the winter and crack it at the top of the wall in the bedroom, but you can't see that crack at the high side of the floor because the separation is on the back side of the wall / ceiling joint.

Do each one own separate property individually?

Not sure about PA, but in NY if there are any lights in common areas the landlord needs a separate meter - you can just go count the meters on the house, if there are 5 then you know there is one for common areas.I wouldn’t use cap rates for a four unit, use comparable properties if possible.

There are some general rules but there is also room for flexibility built into the tax code depending on your specific tax strategy.Is your duplex separately metered?

For actual property management software I now use RentVine and have been very happy, although it doesn't do the business bookkeeping as well (still need QBO, and separate bank accounts, for that).

I've had two separate evictions which started in Feb, and we got possession in Sept.