Increasing supply with hospital grade pump?

Will a hospital grade pump increase my supply to the point if I go back to my medela in style, I will be able to keep the increased supply? Or will my pumping output go back down to regular when I return it? I want to rent one but it's expensive so I was wondering if one month will help me out.

I'm only pumping 20oz a day even with power pumping and a 10 pump a day schedule and my 6w old drinks 24-28oz a day.

Posting in this group because the pumping group is not very active with responses 😰