I know home made aged enzyme essence out of pine apple, papaya etc,., would help in digestion instead of buying expensive enzymes , in addition, would beetle leaves and controlling breath to go through right nostril (a form of Yoga and it is called VASI Yoga) by giving pressure on left side of body be a cheap alternate solution, since age old time in India people chewed betel leaves , nuts and lime paste (optional) to improve the digestion and it can be affirmed by the perfect red color of the tongue, otherwise you have to adjust the proportion of betel and nuts.Please find more detail here on that protocol.

with more betel nuts, and with less paste of Calcium Carbonate, chew up
little betel leaves. Then, swallow the secondary betel-saliva-juice produced, by
spitting out the initially produced betel-saliva-juice. Then, go for a short indoor
morning walk. Then, discharge the fecal-urine substances. Hold the left bottom of
the abdomen with the right hand during defecation (#2), and hold the right
bottom of the abdomen with the left hand during urination (#1). Stop thinking of
anything other than defecation and urination; until they (#1 and #2) are
completely putt off. For any difficulty during defecation (Constipation), lay down
towards left side of the body so that the breath comes out of the right nostril.
And, for any difficulty during urination, lay down towards right side of the body so
that the breath comes out of the left nostril.