Something has gotten me angry

[Kevin]

Further are there tennancy rules in the US? I know that in Holland eg. on long term contracts rent can be increased once a year, and then only by a certain amount max (a few % I believe). In other words if you have a permanent renting agreement (no fixed end date) the rent will likely increase a bit every year.

Varies from state to state, but there are laws. Typically it's only once a year, or end of lease, but I know that in Missouri it's much easier for them to raise the rent on you than it is in Florida.