Hello @mits. I actually just got a similar question at group meeting last night. What I typically advise is the purchase of a Protect multiple websites plan. It does cost more yearly but you can protect up to five domains for that investment. You can get free or lower cost SSL certificates but that cover is your own.
As far as what address to list please list a proper physical address. If your home address is the address you list for your business then you should use your home address. I know that can be a bit intimidating and invasive but if your home address is your registered business address then it is already publicly available. I hope that helps?
roy darling *my posts seem a lot shorter in my head