大家帮我看看这个lease contract

一只宝UID: 2355647

LEASE PAYMENTS. Tenant shall pay to Landlord lease payments of $×× payable in advance on the first day of each month. Lease payments shall be made to the Landlord at ××, which may be changed from time to time by Landlord.
这个from time to time，合理吗？应该都是这样吗？

tombyuanUID: 82085

合同应该有个时间吧，要写清时间，写清房租。写清楚如果房主涨房租提前多少时间通知。
还有最重要的是如果提前终止合同，有什么惩罚。