Without wasting your previous time I will come straight to the point.
So first you have to reach Haridwar. Go to GMOU bus booking counter and book the direct bus. Buses generally run between 4AM to 10AM.
Day 1 - Go to the bus stand and take your reserved seat. The ticket will cost you Rs 410. Bus will take around 11-12 hours to reach Sonprayag. Bus will have one lunch halt too. Lunch would not cost you more than Rs 100. Bus will drop you at Sonprayag bus stand. From here you will have to go Gaurikund by shared taxi. There is no other option. Walk for around 15 minutes to reach the Taxi stand. Gaurikund is the town from where trek starts. Taxi will charge Rs40. Stay at GMVN guest house in a dorm which costs Rs300 per night. GMVN bookings have to be done in advance on their website. The food is again around Rs 100-120.
Day 2 - Start you journey as soon you see the first light in sky. It generally takes around 7-12 hours to reach Kedarnath depending upon your fitness and determination. You will get lots of food stalls on your way. But one thing you must keep in mind is that don’t eat heavily. Keep hydrating yourself. There are many shortcuts on the way but it is recommended not taking anyone of those. They make your trek short but exhausts you very much due to their steep inclination. After 18kms of trek you have finally reached Kedarnath. Pay your respects at temple. Eat some food. Walk around and then go to your GMVN room. There are two options in front you. Either you pay Rs1000 and book a dorm near temple in GMVN Swargrohini or you walk for 15-20 minutes and get a tent room for Rs400 in GMVN Nandi Complex. Food will cost around Rs 150-200.
Day 3 - Wake up at around 4AM and take your place in queue for Darshan.