Just make sure you talk about the benefits to the community and any plans you have to mitigate any disturbances to your neighbors. 

I wanted finished basement space so guests wouldn't disturb anyone sleeping during the day. 3) An extra bathroom.

So, after disturbing them for a week or two you'll then be asking them to pay more rent?

most wholesalers don’t want to deal with the headaches of showing an occupied property (and the potential no-shows) or having to negotiate cash for keys, it add another step to the process but less competition also means you have a better return on your marketing dollars My advice would be to pre-qualified your buyers to avoid disturbing the tenants several times.

We did not disturb its flow or its banks.Thus we have about 2 foot of bank to keep silt out of stream.

Now you have an angry couple fighting and disturbing the other tenants in the duplex, which may result in complaint calls to you.  

The tenant who signed up for the new internet service in his name also never responds when I try to communicate and he has disturbed the other tenant several times by playing games late at night and being loud (the lease also states no one should cause disturbances and tenants areentitled to quiet enjoyment of the premises).My question is: what action should I take here?

This should be able to be completed without disturbing the upstairs flooring system too much.

Tenant agrees not to cause any noise or activity that disturbs the peace/ enjoyment of the neighbors and failure to do so, is a lease violation; 2.

@Stephanie SmithHere are the current exceptions as of today.Repeated noise violations;Disturbing the peace and quiet enjoyment of others;Violating no smoking policies;Unauthorized animals;Unauthorized occupants;Failing to pay or maintain utilities (in certain situations); ORAny other material lease violations