An Orion 4.5 inch StarBlast tabletop Dobsonian costs $250.
This is not a refractor, but it will do what you want. An Orion 4.5 inch StarBlast tabletop Dobsonian costs $250. It would sit on a little table on the balcony. The Dobsonian mount is much more stable than the inexpensive tripods and mounts sold with refractors at this price point.