Sell or Turn Current Home into a Rental Property

I bought my first house for 375k with a 3.5 Interest rate in 2014 and is now worth around 450k(I owe 260K on it).  I am moving out of the state and am wondering if I should rent it out or sell it.  I don't need the money for another down payment on my new house and am Pre approved for a 600k loan.  I have redone all the plumbing and the the house is in great shape.  My current mortgage with taxes is 2k.  I could rent for around 2600-3200 range.  I had a problem coming up with a good capex #(I put 10%) as all I really need is a new roof in 10 years so what number would I put there as a percent in the spreadsheet?  I know you should get 1% for every 100K your house is worth but since I have a low rate and dont have to pay any other fees maybe its worth it to hang onto it?  I know all the little details matter but just kind of looking for some broad opinions.  THanks!