Time involved in a rebuild?

I know this is a very open ended question and alot of it depends on your skill set and the tools available and so on.  But still i want to ask.....Im looking at rebuilding my Rhino's (06 660) engine and doing a big bore kit with a cam and springs.  I have rebuilt all kinds of engines from golf carts to motorcycles to cars and trucks.  Im not worried about being able to do it at all.  Im just curious as to the time involved to do it.  My golf cart i had before (2 stroke) i could rebuild the top end in 30 min so i have the tools and the skills.  I just want to get an idea if its a 2 hour job or a 20 hour job or a 80 hour job.  I have all the tools needed and all the skills...just a rough estimate is all im looking for. 

Thanks guys!

topend  5hrs
top and bottom 10-12

oh heck thats not bad at all.....

bottom end takes special tools, crank pusher outer, flywheel puller, through shaft hex lock removing socket...now there are ways around these tools, but it beats up the parts without the tools and causes undo damage in my opnion...had a shop rebuild my first shortblock rhino motor and after watching them not having the correct parts and how they install and remove cranks I took my motor home and have been building my rhino motors myself since....take your time, Loctite everything!