The Chelsea Flower Show has never really been for the hoi polloi. If someone is the type of person who happily pays £220 for a top-priced seat at Covent Garden Opera House, £59 for afternoon champagne tea at the Royal Albert Hall or about £55 for Dover sole and a couple of side dishes at The Ivy, forking out £110 for an all-day ticket to the Chelsea Flower Show probably isn't going to worry you too much! (Even wandering around Kew Gardens costs around £20 these days).
If you're looking for real value in garden events though, I thoroughly commend this website to you, which lists 'multi-garden' community events across the country:
https://opengardens.co.uk/
A friend and I went to one last Sunday, where we saw 8 of the gardens that were open to view, which was only about half of the total number available. We only had a quick look at the Morris dancers, we didn't have time to hear the band playing, we missed out on the vintage cars and never got anywhere near the art show (all of which were included in the admission price to the event). We did, however, make use of the courtesy minibus services running around the village to get people between the various gardens. We got all that lot for just £8 per head, which I reckon is far better value than the Chelsea Flower Show and probably more interesting too!