Rental properties+investing plan

[Kedu]

The plan.
-buy 4 houses with interest only loans.
-120k purchase price each(600 per month mortgage payment)
-assume 100% occupancy and 1500 per month collected in rent.
-bulk payment for the house due in 15(10?) years
-put 700 per month, per house in the stock market.
-30k invested per year for 15 years x 7% interest=800k
-assuming the properties appreciate 2% per year the total profit would be around 1 mil.

Does this look feasible?