I went 21:years without flying after getting my PPL at 24. Now been flying for 35 years since getting it back. 3 years after regaining it I bought a Jodel DR1050 share for £1600. Shares were £2,300 by 2016, £60 per tach hour and £50 per month.for 6 members. The Group disbanded in 2020.. I now fly a Bolkow Junior.
First revalidate your PPL.
As you do so look around for a Group operating an LAA permit or microlight aircraft.
Or maybe make contacts first to find what you can afford before retraining.
Beware of aircraft too different from what you train on.