Questions about amending an inherited lease upon renewal

[Vinny Joseph]

Hello,

I had my first investment property a couple of months backs, thanks the great guidance from BP. I had to inherit the lease as part of the agreement and its almost time to renew the lease. I have 2 tenants living inthe property. I want to get the opinion on some clauses in the current lease which I want to change or make it better

1. At present the lease is under the tenants name but the dad of one of the tenants pays the rent most of the time. Should I add the parent as a cosigner?
2. These tenants were living for a couple of years. The previous owner hasn't had any recent background or credit checks done when I bought the property. Should I enforce credit and background check as part of the renewal?
3. There is a clause in the current lease saying each tenant should pay 50% of the rent. Is this a common clause when you have multiple tenants?
4. What clause should I add to ensure the full rent is due even if the tenant moves out? Basically I want to say I am renting the entire place not making any room sharing arrangements.
5. In case if a tenant moves out within the term of the lease, will that break the lease? Will the staying tenant be on a month to month lease in that case? Do I need to get a new lease if a new roommate tenant comes in?

Really appreciat ethe opiniin and suggstions from the fols here.

Thanks

VJ