Well, you gotta stay active, either in a gym or outdoors.
I"m about the same year round. In winter, I play tennis, surf, snowboard, but gave up the best overall fitness regime, 3 on 3 basketball (too old, 63).
Climbing gyms are around 50 bucks a month, usually with Cybex machines and running/bike machines.
When I was skiing or snowboarding 40 days a year, that took care of itself.
Lately, I've been renovating an older house, plenty of ladder work, lifting sheetrock and mud buckets, sanding, scraping, and painting.