minnesota state university system offers instate tuition fee for international students as  well.  so, your best bet would be one of the state universities in minnesota.  there are few other schools as well which offers instate tuition for international students.  i do nt recall now, but at least on in arkansas. you should try to find those school first. it is very risky to work off campus in oklahoma, so i would nt suggest you to come in oklahoma.  kansas city is alright too.  why do you have to consultancies to get I 20?  can not you go to USEF and do the process in your own.  it is good idea to do well in toefl, sat and apply early as possible to get into good school with scholorship.  thats how you should start.