Create custom WP-Tablepress form.
my theme is some what narrow, so the form would have to
be coded correctly so it will fit inside the page....
(and easy for me to change/edit width)
Login access: not available. You would simply create the form on your
own wordpress site, once finished, send to me, I will import the
data to my tablepress, and see if there are any issues.
Please via pm for specs.