Hungary's stalled privatization drive should take off in the coming months, as half of the country's 1,800 industrial concerns are put on the block. Hungary, more than Poland and Czechoslovakia, is relying on Western investment banks and consultants. Already, the smallest 300 companies have been turned over to 80 investment bankers and consultant groups. An additional 600 medium-size concerns with up to 1,000 employees will be doled out to middlemen in January. The fee schedule provides fat 7.5% bonuses for sales completed within three months.