Nature of Income from Building

Mr.X taken land on leased for 15 years from mr.Y and X constructed hotel building with in the period of 2 years which will be handed over to land owner Mr Y after completion of 15 years lease period. After completion of building said hotel thereafter Leased by Mr.X  to mr A for running  hotel business.

Q1. What will be source of income ... Income from House property or Business?

Q2. Can itr 4 be filled for such income if it's business income?