There are some bad actors on those apps so be careful. Screenshot their info from the app you find them on, photo copy their driver license and get their license plate number. Hide grannies valuables or put them in a safe that is bolted down. That is just for the property.
You might consider a nanny cam to make sure there is no elder abuse. Stop in unannounced.

In Newark, on Magazine St is/was a rooming house that a few years ago had several airline employees with rooms. Each room had its own bathroom, microwave, small fridge, split unit heat/ac. I would compare it to a hotel room. Very clean, at least 5 years ago. You would have to call rooming and boarding at the Department of Community Affairs in Trenton for the address. I believe it is in the Ironbound section. Not sure how far transit is.

Putting clothes and bedding in the dryer on high heat is the method to kill bed bugs. You can pick up a bedbug on public transportation or anyplace that has seating that has a cushion like a restaurant. Library or theater. They can live for about 6 months without a meal. They usually hide during the day, crawling in Wall outlets out the crease of bedding and mattress. You can call your local housing inspector if you see them to get the landlord to treat for them. If they wait to long they may have to heat treat the whole building. Chances are a neighbor or visitor brought them into the building from someplace else. Look for them laying eggs up at the ceiling corners and putting clothing in covered plastic bins helps keep clothes safe. The diatomaceous earth helps also, but don't let the baby near it.

The Pork Roll Store in Allentown NJ ships it. I buy a 6 lb chub and they also slice it when I go there. They have a FB.