Original sentence: Because a first time home buyer grant usually pushes up the amount that such a buyer can borrow from a financial institution by more than the value of the grant, in competitive housing markets where a majority of competing buyers will also have access to the grant, the end result is that lower-end houses increase in price also by more than the value of the grant, and first home buyers tend to accumulate more debt than if the grant had not available
Edited sentence: Because a first time home buyer grant usually pushes up the amount that such a buyer can borrow from a financial institution by more than the value of the grant, in competitive housing markets where a majority of competing buyers will also have access to the grant, the end result is that lower-end houses increase in price also by more than the value of the grant, and first home buyers tend to accumulate more debt than if the grant had not been available