Momentet

I might have a projekt - what is your email?

Try playing arround with the position element, and you will most probably find out how to do a sticky element :-)

I can also recommend https://wordpress.org/plugins/wp-paginate/ if you dont want to do coding on your own! And yes it still works even though it has not been updated for a while :-)

I have not tried any of them, but I dont see why they should not work for your client. I have worked with several ERP systems, and they have always been Extremely har dto work in and navigate in. I could imagine that a lightweight PHP ERP system would be just as fine as one of the large AND expensive ones...at least for your needs... Anyway, looked over the options and phreeSoft looked pretty good to me :-)