My gym currently consists of:
A Concept 2 rowing machine.
A ledge over the stairs for pullups.
A rake hanging from a rope harness for inverted rows.
Workouts have been:
Bodyweight strength and conditioning. eg Pushups/Split squats. Pullups/SLDL. Pike pressups. Rows. Core.
8x250m intervals rowing with pushups/pullups in the rest interval (This is harrowing :) )
Mixed with responsible MTB rides (I finally cracked on the last ride and hit the single track again)
I have a kettlebell on its way, after finally finding one that wasn’t ridiculously priced.