This may be a good idea... my opinion keeps getting swayed this way and that

I am somewhat interested in wildlife photography, but I'm not trying to use it to get rid of the burden of wealth. As seems usual with my photography interests, I seem to find some of the most demanding requirements for tripods there, (which translates to expensive).
If I get a good pair of tripod legs, I could always upgrade heads if necessary, so I could start with a pan head, and get a gimbal if I wanted in the future, or get a ball head now, which would leave the option to get a "sidekick" gimbal head in the future, if necessary, perhaps. Between those two options it depends primarily on which (pan or ball) will serve me better for most purposes, night, landscape, video etc) in the present.