Suggestion number 1: add posibility to have bullet proof vest in inventory, maxium 2, prevent use armor with bounties and 6 stars and add in confiscated weapons after exit from jail.
This would be convenient but I have concerns about abuse - as a whole there are firearm shops / police departments widely available so not sure it is necessary.
Suggestion number 2: add posibility when quit game inside your house, when entering again in server join in owned house.
You can actually set your spawn location in /settings including to properties you own. Not exactly the same as your suggestion but will allow you to spawn at a owned house when joining the server.
Suggestion number 3: add two stars mode ticketable instead arrestable.
Not really a need for this because the /bribe feature functions similarly to paying a ticket - absolving you of your wanted stars. Hope this makes sense.
I like the sprit of your suggestions but rated 2/5 from me - sorry...
