[IamIan]

The right tool for the job.

If you need to relocate / move frequently that makes for different design choices than if moving / relocating will be a rare event.

Traditional RVs (motor home or 5th wheel) are primarily designed around the assumption of frequent relocating / moving... if that's what you will be doing they might work for you.

A tiny house ... weather it is built on wheels or not .. is instead primarily designed as a house ... even if it is tiny .. as such they don't tend to relocate/move a well as the traditional RV style .. but they can gain advantages due to the difference in design intent.

Moving into a tiny house is on my list .. currently expected in the next 1-2 years... I already live in a studio apartment .. This studio apartment is less than 300sqf now .. and it could have been designed / laid out better than it is ... but that's just me .. and millions of others who also live in such spaces .. but that is not for everyone.

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One advantage of a tiny house is that it is even more expensive items don't increase the over all house cost as much ... It takes more materials and $ to insulate a 2000sqf house than it does to equally insulate a 200sqf house... it takes more materials and $ to put high insulating energy efficient windows in a 2000sqf house than it does a 200sqf house ... etc.. etc.

Of course just being tiny doesn't require you to make any such investment .. it is entirely possible to build a drafty , very poorly insulated , energy hog of a tiny house .. but if you want to have a highly insulated , and or high efficiency house ... it will cost you less materials and $ to do it in 200-300sqf than if you tried to be equally insulated / efficient in 2000+sqf.

There are numerous companies that make them for you (if you aren't the DIY type) ... there are also numerous examples of people who built it from scratch themselves (if you are a DIY type).

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One other thing to seriously look at before you drop and major amount of $ on this project ... is your local laws ... In many parts of the U.S. there are restrictions that directly or indirectly prevent the 100% full time residence in a tiny house ... although AFAIK Texas is one of the least restrictive states for this ... but it is important to know for certain before you drop the $.