One if you do not register your company as a foreign company you usually cannot file an answer in court if you are sued. 

Have a big database, sellers who look up my brand/appeal.

If a person owns a rental property in IN and if something happens on that property, the cause of action (lawsuit) would go before a court in IN, with an IN judge, citing IN law.

She's not going to have any leg to stand on in court if you get that far unless there's some explicit language prohibiting the owner from assigning responsibilities to another legally authorized party, and I'm guessing there isn't if another PM company was maintaining the lease and provisions - and the fact that the tenant was voluntarily working with the other PM confirms the acceptance of an authorized agent even if it's not explicitly stated, the same way if you accept rent from a tenant after a lease expires you imply acceptance of the lease terms continuing (which is why you should always have a holdover provision). 

I don't try to evict based on neighbor complaints as those aren't super reliable and the people likely won't show up to court. 

These properties appeal to students and low-income renters, especially if traditional housing is limited.

The only thing I would mention here is you shouldn't have anything in your lease that a court would consider unreasonable, in case you ever need to go to court.

Court of Appeals for the Fifth Circuit issued a stay of the nationwide preliminary injunction previously granted by the U.S.

The process for commercial properties is basically the same as residential properties, so it takes work.Again, echoing Dominic, a good investment is a good investment, whether you spent 8 months courting an owner to get them to sell to you, or whether it is on CBRE/Cushman/Marcus/Loopnet or any other brokerage website.  

Put a lien on the property(s) they own, this is needed by some court action (i.e. lawsuit in civil/criminal court)