I have a 40 year old Leitz Tiltall that sill works perfectly, a larger Bogen that is just fine and a Gitzo carbon-fiber that for its size and weight is perfect for traveling. The Gitzo will hold a mf with a
250mm lens or a 150 with a 2x. It's better to invest in a good (used if available) tripod. It will be supporting equipment that costs more than the tripod and should last many years and probably one's photographic lifetime.