Thank you acchabaccha and freddykeat

Exactly as Singaporeans are entitled to the on arrival visa which is free - and I only plan on staying for a few days each time - it makes me wonder why I would want to go through the trouble of obtaining the documents and paying for a Family Visit Visa which I'll have to renew every 6 months too. But is there any other reason why I should get the family visit visa over the on arrival visa?

Also with regards to the family resident visa, will there be a minimum amount of time I need to live in Doha for the Visa to continue to be valid? Or can I just hold that and travel back and forth Singapore (I work in Singapore)

Thank you for your time