Your basic Cherokee or C172 are not real 4 people aircraft plus bags plus full gas aircraft. I remember from some 30 thirty years ago. Both are pretty doggy but felt that the 172 had better performance overall. If you consult an owners manual from either of these aircraft, you should be able to figure out how much weight you can take. A flying instructor can help u figure this out. Plus hot weather and high elevation can further reduce weight carrying capability. If you want more then a Cherokee 180, or Cessna 182 can carry more but of course a lot more money. Of course like buying a Porsche get some prof. help if you do buy. Beware of high time engines - engine rebuilds are expensive(just like a Porsche). When I learned to fly, I rented anything from a Cessna 150 to a C172, for twin ratings/IFR-Beech Baron, Twin Commanche. After u rent, you walk away. If you buy, then of course yearly maintenance, fix radios , instruments etc. These repairs do not come cheap. I favour renting but if you buy, costs can be substantial. Hangar rental or tiedowns = more $. I still like the C172-better view with a high wing whether u rent or own.
Good luck!Hope this helps.If in doubt ask.
