To some people, traveling is part of their lives. Being able to get away from it all to recoup and reenergize is very important in retain the enthusiasm needed to pursue different things in life. It you look at it this way it is easy to see that to them, a travel trailer is a smart and much needed investment.
A travel trailer that is properly taken care of can last a very long time. There are certain parts of trailer that will require replacement overtime but the cost of replacement shouldn't be overly expensive.
Now, an issue you might encounter is the lack of parts for old models. The trailer manufacturers usually stop the production of spare parts after several years. This is similar to how old truck parts are phased out. It makes very little sense for the manufacturer to continue producing parts with little or decreasing demands. This leads to owners of old models to have a hard time finding replacement parts for trailers.
The aftermarket industry provides the answer to this problem. Modern aftermarket companies produce parts for trailer that rivals the quality of those from the original manufacturer. This is thanks to increased cooperation between original equipment manufacturers (OEM) and aftermarket companies.
An owner will no longer need to worry about lack of parts for the trailer since there are other companies aside from the OEM that can supply him or her with the replacement parts.