Managing entrance on Duplex?

[Sonny Dong]

Securing a duplex and house hacking one side. Each side is 3/2.5. Would it be wise to install a RING doorbell to monitor who goes in and out of the unit since I would be renting out by room? (renting out by room would net me better cashflow). It isn't in the best side of town and worried about unwarranted guests being brought by tenants. Can I add this in the lease agreement? In addition are utilities usually paid by tenants? The weather is very hot and water is expensive down here in Texas. Would one - most senior tenant - be responsible to take care of the utilities, collecting payment from other tenants?