There wasn’t much of a wait at all for a Lyft. That resort is large so it would sometimes take them a few minutes to loop around to us. I also ordered the Lyft once we were at or just about at the main lobby - not to our lodging building.
I largely used the Lyft XLs as they weren’t much more than the regular Lyfts (I had a 10% credit on all rides that week). We did take a Minivan once (although not from POR) and that was a bit more of a wait (however that was a day with crazy weather - like, tornado warnings). If I had it to do over again I would have used a Minivan for our two Magic Kingdom days. We made it to both on time (before RD) but I was stressing over it so it’d be worth the $ to not stress.
We did not rent a car at all so I have no advice there. That’s just our personal preference - I simply prefer to not deal with it and just take a car service everywhere but my husband and I are city people who prefer to walk or ride share in general.
The boys and I missed (intentionally) our MDE back to the airport so we took a regular Lyft. That took 33 minutes and cost $31.83 including tip. Whereas the Minivan from the Poly to the Grand Flo (again, tornado day - monorail was down and we weren’t walking with the crazy weather, buses were jammed) took 4 minutes but cost $20.63 including tip. Only resorted to Minivan as I wasn’t sure they were allowing regular Lyfts/Ubers to pick up at resort (there was some flooding so access was limited).