Bought a wheelie bin on eBay for 35 quid, brand new
Put a tank connector in the bottom and various attachments so that the pipe has all the water pressure to aid the pump. Hole saw in the bottom, climb in it, tighten up and off you go
Ended up costing me 40 quid.. Might not look professional but i only have a citroen dispatch so an IBC is out of the question,
Tomorrows customer is 50ft away from where I can park, mobile buffer tanks the best way forward for this.