Sometimes you can get free install from them if they are running certain promotions.

Need percentages mostly for tax purposes.

Collecting rents can be done through the LLC that owns the property or a separate management entity you create just for this purpose. 

But if you are buying it for your own purposes, then who cares?

Aside from that, for investing purposes, look at areas with generally lower property taxes as they can eat into your budget.

Basically, from what I understand, if you sell a building as a particular Occupancy and the CofO is different, the Contract of Sale can be canceled due to mis-representation.In my experience, I was the Buyer of a buildings which was a 3 Family building but the CofO was for a 4 family building here in Brooklyn (Clinton Hill is the neighborhood).I fully believed I could have canceled the Contract since it said it was a 3 Family, but I purposely did not because it was to my full advantage to buy it with the CofO of a 4 family as I wanted to convert it back to increase the rental income.BTW, once I bought the building, I immediately knocked out a staircase to the apt with 2 floors and installed another kitchen to have 4 total kitchens in the building on each floor.

I wrote the above for informational purposes.

It comes down to your purpose and numbers.

It's obvious for my circumstances that for IRS purposes, I'm a flipper and am treated as Dealer Status.

I wrote the above for informational purposes.