Adjustable Dog Lift Harness for Large Dogs, Soft Rear Leg Support Sling for Weak Hind Legs, Senior Dog Mobility Aid for Stairs, Cars, Walking & ACL Recovery

Also: When walking your doggo you can lessen his weight on the leg by looping a piece of fabric under his tummy, and you literally use the cloth to hold him up. Essentially you become an antigravity machine for your doggo. As money is tight, just use whatever you have on hand. When you do get some cash, look up "lift harness" Here's one that I got for my dog. It works a charm. https://www.amazon.com/dp/B0GWHDLSRJ?ref=ppx_pop_mob_ap_share