Landlord can he charge extra for visitors

This is a caravan park on a farm, but the landlord also said we could build a building to live in instead of a caravan/ tent. If we do that we must pay for the building each building is a different price it depended on it size which we paid R97000.00 which he also mentioned that this cant be sold, we can be passed it on to the only to original lessee children. plus we must pay a monthly fee of R1600.00 we not able to rent the building to anyone else when the children take over when we pass away. or the building will be handed back to the lessor.

The QUESTION is

Can he now decided to charge for our children coming to visit us for he want a fee of R100.00 per person. When we pay for our own electricity and water. plus we paid for the building and we pay for our monthly fee of R1600 this placed is for pensioners mainly. yes we haven't paid for the land on which we built the house on. this property is in a trust. The thing that also bugs me is that there are no plans submitted to be passed not sure if you need plans on a farm to build.

There is an ablution block with toilets and shower/ bath we use to use it but we don't do that anymore for we have our own shower and toilet in the house. When we did use the ablution we where staying in a caravan. The ablution really had a bad smell of sewage we always complained to the landlord and nothing was done, for every toilet in the area has sewage pit. It not connected to the municipality line.

The landlord collect the rubbish for each site and dumps it just above the caravan park, and the building materials he dumps just in the valley next to the park.

i just want to know what are our right as a permitted tenant and can he do this by charging extra fees. when we been staying there for nearly 3 years.