Questions On Hair Growth. Hair regrowth?

I have started loosing my hair and currently in stage 2. My hairs are thinning and I see its loosing rapidly. I visited various centers and they suggested for PRP and Hair Transplant which I agree to perform. Now my questions are - 1. Which center is best for the treatment? 2. Will this be a one time investment or do I need to continue my maintenance treatment year after year? 3. Some centers charge too much and some are fairly reasonable, but how the cost very so much if the teartments are same? 4. Is there any side effect of such treatments? 5. How robotic and manual hair transplant differs? 6. How much is the actual cost of PRP? 7. How effective is Mesotherapy? 8. Does a alteration in daily routine and diet is a must? 9. How soon the results can be visible if I undergo for the treatment. 10. What all home made effective remedies we have for hair regrowth?