[uoaei]

This equates to ~$90/mo gym membership with a one-time registration cost around $100, for scale.

This is the going rate for most climbing/bouldering gyms with full freeweight sets, treadmills, spin bikes, showers, saunas, etc.

I personally value cross-training and weightlifting because those are the ways to see real long-term benefits to your health. Bone density, testosterone, flexibility, good posture, will all pay dividends down the line. You can get cardio any number of ways, including commuting and running groceries by bike.

[red-iron-pine]

As mentioned elsewhere, this was basically what I ran into. Total cost of ownership for the bike was on par with a nice gym, and the gym offers spin classes... on top of weights, rowing machines, steam rooms, etc.