How do I use a trailer-house then?

[Alwin Alcott]

there is indeed no real difference between a house and a trailer /mobile home

You also can't hook it to a car. The item itself must be drivable or it's not possible.

I'm pretty sure there are trailerparks, but will not be much different than any other rental...perhaps the length of rental period is more flexible. Placing it anywhere else will lead to returning to your inventory

[Alwin Alcott]

there is indeed no real difference between a house and a trailer /mobile home

You also can't hook it to a car. The item itself must be drivable or it's not possible.

I'm pretty sure there are trailerparks, but will not be much different than any other rental...perhaps the length of rental period is more flexible. Placing it anywhere else will lead to returning to your inventory

[Syo Emerald]

All your house related questions boil down to one essential thing: Some people enjoy different kinds of houses. From big ships to rooms in the sky or a trailer-house. Its often just the look thats different.

[Rolig Loon]

If you want to leave any object in SL in a place where you expect to find it the next time you log in, you had better either own the land or be on very good terms with whoever does.  Therefore, if you want to consider your "house" a mobile home that you can drag around SL, you'll need to buy or rent land in each new place.  Rent a new parcel each month on a different region, pull the house out of your inventory, and rez it.  Forget about what a "mobile home" in RL looks like, though.  There's no reason why yours in SL has to look like it could be pulled around by a semi.  It's just a house -- a pup tent, a bungalo, a cabin, a castle, a MacMansion.  

[Lindal Kidd]

Syo's right!  Here are the rules:

• You have to buy or rent some land to put any objects on (except for sandboxes and such, which allow you to have objects there temporarily.)
• Once you have some land, you can put anything you want on it.  A house, a yacht, a trailer, a hot air balloon, a mountain with a castle on it, a cardboard box with empty wine bottles scattered around...subject to any restrictions imposed by your landlord.
• You can drive any sort of vehicle anywhere (subject to some restrictions, see below.)  But you cannot LEAVE a vehicle out on land you don't own, or it will get returned to you.

Some restrictions on where you can drive vehicles:  Land that does not have sufficient spare capacity to support your vehicle; land with ban lines around it; land with a security system on it; land where the owner prohibits vehicles driving around.