it can be done at home, you just need to look for the right kits (and how to get them). for hemo-related analysis, you can use old school methods for enzyme related, look for elisa or similar hardware to read values
procedures are easy and dont need expensive hardware.
main problem you can found is a wrong value. so, as a hobby it shouldnt be a problem. if the idea is follow the evolution of a diease... go to a real doctor