I have a 300Gpd Ro-Man with the old pump box they used to sell, I can fill my 440L storage tank from empty in 6-7 hrs. Tds in is 150-190, out is 001-000, and that's before resin.
The other week my brother's resin was spent and I was able to fill his 650L van mount with 000tds water twice as well as supplying my own 350L trailer mount with 2-3 fills, and even then the Ro was only working for 12hrs at a time over 3 days.
I would heartily recommend the Ro-Man products if you buy a pumped version. You wont need much resin as they are so efficient, and as I just explained above, you ARE able to supply over 1000L per day at 001-000 tds.
Tim