This.
While I love the hybrid idea and I fully intend to buy a 2021 Toyota RAV 4 Prime PHEV, assuming it isn't prohibitively expensive, Old and Hybrid and Cheap aren't things that go together well. The batteries have a limited life and even a remanufactured replacement is still more expensive than an engine or a transmission in an conventional ICE vehicle even on something small like a Prius and life is affected both environment and usage.
Hopefully, as EV and PHEV get more common and more mature they will become much less expensive to service over the long term but right now, you are sitting on a ticking "service bomb" waiting to explode your wallet based on my research.
I am looking forward to the day that I can drive to work and back without using a drop of refined dino juice but we aren't really there, yet.