2001 swing away or slide tongue

If anyone has an idea as to why someone would weld a tongue on a 2001 trailmanor, please respond.
We have found a used 2001 trailer that looks like it is in very good condition. We are going to see it this weekend. The owner says the previous owner welded the tongue (which is a slide, instead of a swing around) so we are not able to slide the tongue back to fit in a garage. Does anyone know why this would have been done? What is the purpose? Also this unit has an air conditioner inside the unit, (beside the stove) which looks like a vent of some kind, but is actually like a window unit. Has anyone experienced this kind of air conditioning? We are excited to have found something, that we think will work for us, and if not will keep checking this site. You all have been very helpful with ideas, and knowledge of trailmanors. Thanks
baby jane