I've been given the task of helping the Hearty Squirrel project (Edinburgh University) look for a cargo trike to carry food up to Kings Buildings.
They have a budget but I'm only involved as an advisor, not a supplier. Spokes have made a grant available plus other funds have come from elsewhere.
The budget means E-trikes or Urban Arrows are not really possible anyway so they need to find a used geared trike. Low 7 speed set up at least so it can move uphill slowly at least.
Yes, a bike trailer could do this but cargo bikes make good advertising platforms and get noticed.
If anyone has a source let me know. Soul Cycles are agents but we are looking at a budget of c£1k so not a lot of money for even a decent used cargo trike