A few questions: - Where do I start? -Do you have a recommended provider for reseller services? - How many hours per week do you spend on it?
I have to say, that you dont do such thing for a passive income. Its hard work. We had 24/7 support (customers want this kind of service). Also we run our own servers. This is because you dont want to tell a customer: Sorry, the downtime is forced because XYZ has crash his servers.
But anyway. Eleven2 (https://www.eleven2.com/reseller-hosting/) has nice reseller plans and managed servers.
You have to spend around 1 hour a day, e.g. to answer ticket requests, setup new accounts or servers.
If you seriously want to start a webhosting company, learn how to administrate a linux server and to use cpanel the right way. A administration panel isn't the answer for all kind of server administration.
-Mumu