If you or your loved one encounters mobility issues, then you might need a wheel chair to help in moving around for the meantime. It might be overkill to purchase one given the temporary nature of the condition. Perhaps the doctor told you to rest your legs for a few weeks or even a few months, after which you can ease back into your regular activities. The better solution would be to get wheel chairs for hire.
Renting a unit will allow you save money and try different models. If your initial choice does not quite work, then you can return to the provider and opt for another style. Make sure it is sturdy enough for your weight and portable enough if you travel. Your previous experience will surely point you to what you truly need. The savings are substantial and should definitely factor into your decision.