You need to take care of yourself more then worrying about a trailer. If you rush in and just buy a older one to mess around with you won't be happy with it. It sounds like you need the space for your motorized scooter and other things to make it easier for you. If you wait you can always wait to see what new people our inventing for styles and you can down the road have more the resources to get a unit you can be happy with. Your health is more important, And CT our not for everyone it can be alot of stress in designing one and building one from scratch. And when doing it you plan on a dollar amount for the project and once you get into it you our way over your budget because things come up and new ways of doing different things. You migh be better off one already done so you don't have to worry about things and also effect your health as well over a CT project. If i could of done it all over again I would of done things different as well that is for sure. And 6X10 is nice due to towing it but once you get the bed inside and the cabinets in front you don't have to much space left. So if you wait and then get something that is 7 feet wide instead of 6 feet you can lay out the bed different and have the room you need for the scooter you have and the 4 wheeler as well. this spring I am going to redue mine due to using it this last summer and thought of news ways for more room and make it more easier to put things. And the insulation is a big key I put in the blue insulation and unhappy with it because you can hear the people next to you in the campground of every word. And I even used thicker insulation. And there is so many things I would of done different and better. So maybe a CT is not for everyone because it will cost way more then you think and at the end you could buy a large travel trailer instead and have more room. And be happy more because if you have to buy all the things it will add up fast. Trust me.

So wait and don't try to find one and then be unhappy when you have to pull out from it due to health it is just not meant to be for everyone. And maybe that is your sign. But I do hope your health gets better and you can get stronger again where you can find one maybe that is done already that meets your needs and you can be happy with it for years to come.