really like the hanging tire concept for either stick or make shift dummy , but to make it a little more realistic I'd probably add some gutts ( like a board or padding to the middle) and throw on some arms and legs ( sand or soil stuffed stockings ).good tip.never heard that before, but I like it alot
btw : a sand + cotton mix filled sand bag is almost exactly the same as a traditional chinese punch bag and add another or two and hang them from your circular clothes line, and you're training shaolin style .
Tires and old wheels make good balance practice for your eight step bagua zhang stepping and if you can find something concave, all the better.
Detergent on some mediumish rocks while you work some forms good for balance
and any height will serve a different purpose dimension and muscle group.
in fact throw on some socks , lube up your bathroom floor, and do some forms ( alah shaolin slippery rock in river style training ) and kill 2 birds with one stone!!

Your wife / girlfriend / mom and body will love you for it
I've seen and trained with folks who do their iron palm conditioning on steel basketball posts, have used my automatic garage door rungers for chin ups and pull ups ( or even my pantry doors or shower rail ) ( but do check weight allowance if try this yourself). Also used the corner of kitchen bench or hand rails on a path for elevated unanchored feet press ups ( also great for lower back isometrically ) , v holds and L holds, and my sofa back as a bridging / stretching aide.
Broomsticks make good makeshift poles for wrist / forearm conditioning and any elvated groove or mass a good leg / hip , and arm and core ( if you lean out and turn / twist from your grab ) stretch bar.
Trees are good to use as a dummy, different branches acting as different heighted limbs and if not too young , make a good quick chin/ pull up site
Sand and or water buckets make good make shifts weights if you can't afford any or can't transport yours easily, and a babys walker or stroller with a front wheel locking into position function ( or just an exercise ball ) coupled with a sofa or dining chair, makes a great split stretch assistance tool. ( just be sure iuf you get feet up there you have a bottle of dissinfectant handy

)
Enough from me but looking forward to hearing what everyone else is doing .
A good tip is a good tip..........
and your own creativity your limit.
cheers
BL