... would beat the hell out of driving and is cheaper than commercial.
Serious are you high as a kite?... I'll give you the beat the hell out of driving, but once you factor in the plane, charts, ect, I highly doubt based on plenty of experience that a Cessna ride is cheaper, maybe you should shop around more....
On the flip side, its cool to take friends up and all, but realistically, as a PPL you would be nuts to try to limit yourself to weekend trips anyways, things happen, planes break, weather changes, ect. This idea is like communism, it works on paper, but realistically probably not going to happen.
Additionally, after your 25 hours of IFS time you need I believe if the cobwebs serve me correct like 10-15 hours with a whole bunch of solo time, if you are a different base, plan on some extra time for a local checkout too, it can be done, but whats the use without an instrument rating? really none, so just sit back relax, and let the retired guys up front do all the work, besides flight school is stressful enough without having to worry about planning a VFR cross-country on the side.