If you get a van or a trailer, you may want to consider building some custom wheeled racks to help carry the gear into the venue.
A friend of mine welded together several steel multi-shelf carts that he uses to store and transport his speakers & other equipment. Once loaded, cart and all go into his trailer and are lashed down securely. At the venue, he rolls one cart at a time into the facility using ramps for the occasion. Makes setup and takedown a lot easier, especially if you’re a one-person crew.
Chief considerations are that the carts are narrow enough to fit through doorways, and short enough to maneuver or fit into elevators. Wheels MUST be strong enough to handle the overall weight, and large enough for the type of terrain you’ll be using.