Originally Posted by SpringerPop
First, I think you need to know just how "heavy duty" your trailer really is. What is the single-axle's capability.
Even my small-ish trailer has dual axles. Something to consider.
Then, what will you use as a tow vehicle?
X2, and after contrating my own home and finding out the hard way about " cost over-runs" and slight "miss-calculations" JMHO. you would be better off to find a factory unit in your price range and do some up grades.A ton of units out there at a good price.
Would your state laws allow you to do your own wiring, plumbing or propane system work ??Would you be able to license / insure it when you finish ? Do you already own all the tools your going to need, did you figure the cost of tools into construction cost ?
At 4' across the deck the widest, stable unit you could build is 6' , if you look at any TT structure is limited to the outside of the tires for stability, only tent trailers tuck the tires under and they don't tow that well.
Sorry to be a wet blanket, but this is my 2c worth , a lot of questions to ask before you spend a $