I work with jibs professionally so I'm sorry if I'm talking about too heavy duty of a solution. I would never use any lower priced jib professionally below the stanton triangle jib, the motors are usually under powered and arms end up being super wobbly. If you hunt around you can find a older tube style stanton jib for 3k. i bought a used triangle jib for 5k off eBay and put another 10 into it, it has paid itself off 3 times over already however i do this as a full time job so i understand if I'm talking too much $$.
I can put any camera on my jib. There are a few solutions to get focus, iris and zoom. I have also worked many different jobs with FS700's on my jib.
For Focus the Jimmy Jib has a built in finger focus in the zoom controller. You need to buy film focus gear for their motor and also a braket to mount it on the 15mm rails. Iris is the same, you can see in the photos my friend came up with a clever way to attach the motor to the iris wheel.
Other option for focus is redrock finger wheel with a 25ft extension cable. Or have wireless follow focus system with assist.
I own micro force zoom handle and motor for lens without zoom motor built in.
Only thing i use handgrip for is to start/stop the camera however this is super useful when shooting high speed.