Let's make couple of things clear here.

1. Things are different now than it used to be year and half ago. At that time, You could easily find consultancies ( in hundreds) who would give you free training, place to live and give some money weekly for food and other expenses and even file H1-B at their cost whether you were from any background. This is why we see tougher rules now a days regarding H1-B.

2. At present condition, there is hardly any consultancies that won't charge you for a training, many of them are even changing their way of doing business into this filed. Most of them are focusing on things that doen't involve hiring and filing H1-B.

3. Now a days, even if u are from a related field, with solid background, they won't file ur H1-B unless and until you have project on hand. Things are worst upto a level where consultancies are not willing to file H1-b if u pay all teh cost too.

4.The best option I see or ( lets say my opinion or even what i Did couple years of back). I paid for my training ($700). I did my marketing by myself. I landed a job after a month. Then I went to consultantcy of my choice and did bargain on pay and even pressured them to file my H1-b @ their own cost.

5. One thing needs to be very clear now a days. Unless and until u have a project and related field, it is very hard to make consultancies file ur H1-B. I know it's hard, but its the truth.