I was recommending use of online wallet as-
1. He can directly but, sell Bitcoins there
The two online wallets you mentioned has very specific policies regarding transactions related to gambling. If they see any transactions that involves a gambling site, they may close your account without any notice.
2. He is new to it
4. I feel online wallets are easier to understand. There are support sections.
How hard is it to find the send and receive button? Online wallets are not any better in terms of UI. And this:
https://bitcointalk.org/index.php?board=98.0https://bitcointalk.org/index.php?board=99.0http://docs.electrum.org/en/latest/faq.html3. He is only willing to use it for a specific thing. ( Maybe to be used only for done days). So why download the application.
I'm not sure how hard it is to take 2 minutes to install a program as opposed to creating the account in 5 minutes. Desktop wallets gives you a lot more privacy and security.
5. For desktop wallets, applications must be installed on each of the device.
How many do you want. If you are going to use a web wallet, you would probably be downloading it to your phone too.
6. It would be easier to remember passwords of Coinbase or Xapo.
Does anyone still memorise their private keys?
7. I don't think he needs things such as paper wallets, offline mode.
Neither do I. I just gave it as an example that desktop wallets are as, if not more user friendly than web wallets.