I highly recommend renting out your old place, especially if it has a low interest rate, assuming you can get enough in monthly rent to cover your mortgage payment.
I use a property manager and it is super easy, they take care of everything from finding the tenants, collecting rent, organizing all the maintenance. I just get a monthly statement and update from them. Taxes are also pretty easy, I just update a spreadsheet once a month with all the costs broken down into the categories on the tax form (can't remember which one it is), takes like 10 minutes a month.