yes transporting water is an issue if u dont have the right equipment.
well u can use tap water and condition it with chemicals to remove chlorine and use some prime to get ur ammonia and nitrites under control.
if u use bio spira u can add fish next day (if there is no chlorine in water)
water 2 ways u can do it. one u can buy a 55 gallon plastic barrel from local hardware store for $30-40. hual that for water transport and buy RO
water for less than 50 cents a gallon or you can buy your own RO
unit for less than $100 on ebay and make ur own water.
Mollies are tough but make sure the water is free of chlorine and ammonia.
they can take nitrite a bit not too high.